Android中瀏覽器或者應用通過scheme喚起目標應用，打開目標頁面的實現，及多次喚起時目標應用的攔截頁面未執行問題

本文模擬的是appA喚起appB，打開指定的BActivity頁面的情況，兩個應用的頁面結構如下圖所示：

瀏覽器或者其它應用，通過scheme配置喚起目標應用，需要約定的uri，如示例代碼中的

String uri = "appb://com.windfallsheng.myapplicationb/sign?type=1&targetPage=BActivity&userName=windfallsheng";

在appA中只需要根據

package com.windfallsheng.myapplicationa;

import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void launchAPPB(View view) {
        String uri = "appb://com.windfallsheng.myapplicationb/sign?type=1&targetPage=BActivity&userName=windfallsheng";
        Intent intent = new Intent();
        intent.setData(Uri.parse(uri));
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f2f2f2"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:gravity="center"
        android:textSize="35sp"
        android:background="@drawable/selector_item_background"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintVertical_bias="0.5"
        app:layout_constraintWidth_percent="0.7"
        app:layout_constraintHeight_percent="0.15"
        android:paddingRight="10dp"
        android:paddingLeft="10dp"
        android:text="喚起B應用"
        android:onClick="launchAPPB"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

在appB的攔截頁面配置：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.windfallsheng.myapplicationb">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".WelcomeActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <intent-filter>
                <!--接收外部跳轉-->
                <action android:name="android.intent.action.VIEW" />
                <!--該頁面可以被隱式調用-->
                <category android:name="android.intent.category.DEFAULT" />
                <!--應用可以通過瀏覽器啓動-->
                <category android:name="android.intent.category.BROWSABLE" />
                <data android:scheme="appb" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTask"></activity>
        <activity android:name=".BActivity"></activity>
        <activity android:name=".CActivity"></activity>
    </application>

</manifest>

package com.windfallsheng.myapplicationb;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.text.TextUtils;
import android.util.Log;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;

public class WelcomeActivity extends AppCompatActivity {

    CodeReqCountDownTimer codeReqCountDownTimer;
    String type;

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        Log.d("appB", "WelcomeActivity#onNewIntent");
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);
        Uri data = getIntent().getData();
        Log.d("appB", "WelcomeActivity#onCreate#data=" + data);
        if (data != null) {
            String userName = data.getQueryParameter("userName");
            String targetPage = data.getQueryParameter("targetPage");
            type = data.getQueryParameter("type");
            Log.d("appB", "WelcomeActivity#onCreate#type=" + type + ", targetPage=" + targetPage + ", userName=" + userName);
        }
        TextView tv = findViewById(R.id.textView);
        codeReqCountDownTimer = new CodeReqCountDownTimer(tv, 4 * 1000, 1000);
        codeReqCountDownTimer.start();

    }

    /**
     * 時間倒計時
     */
    class CodeReqCountDownTimer extends CountDownTimer {

        private TextView tv;

        public CodeReqCountDownTimer(TextView textView, long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
            this.tv = textView;
        }

        @Override
        public void onTick(long l) {
            String timeStr = l / 1000 + "s";
            tv.setText(timeStr);  //設置倒計時時間
        }

        @Override
        public void onFinish() {
            if (TextUtils.equals("1", type)) {
                tv.setText("即將進入B頁面");
            } else {
                tv.setText("即將進入主頁");
            }
            new Handler().postDelayed(new Runnable() {
                @SuppressLint("NewApi")
                @Override
                public void run() {
                    if (TextUtils.equals("1", type)) { // 經scheme喚起應用；
                        startActivity(new Intent(WelcomeActivity.this, BActivity.class));
                    } else {// 正常啓動應用；
                        startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
                    }
                    WelcomeActivity.this.finish();
                }
            }, 1000);
        }

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        codeReqCountDownTimer.cancel();
        codeReqCountDownTimer = null;
    }
}

目前的配置是可以實現目標應用appB被喚起，但是有一個問題，如果appB是在被首次喚醒啓動後再次喚起，或者appB是被桌面圖標首先啓動，則攔截界面不會啓動；

正常的業務需求應該是每次從瀏覽器喚起應用後，都會經過應用啓動頁，之後再跳轉向目標分享頁面，同時應用如果在後臺運行，則不會重啓應用，正如下面圖中演示的情況；

appA首次喚起appB的情況，如下圖：

appA首次喚起appB後，再多次喚起的情況，如下圖：

要解決一開始的問題，實現這樣的業務情況，需要在喚起的應用B中做處理：

將應用B的攔截頁面的Activity啓動模式改爲：

android:launchMode="singleTask"

其它的啓動模式是無效的。

解決應用被三方喚起後，再通過桌面圖標啓動，會引起應用重啓的問題的解決方法是在啓動頁加入如下的代碼：

if (!this.isTaskRoot()) {
    Intent intent = getIntent();
    if (intent != null) {
        String action = intent.getAction();
        if (intent.hasCategory(Intent.CATEGORY_LAUNCHER) && Intent.ACTION_MAIN.equals(action)) {
            Log.d("appB", "WelcomeActivity#onCreate#finish");
            finish();
        }
    }
}

完整的代碼示例如下：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.windfallsheng.myapplicationb">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".WelcomeActivity"
            android:launchMode="singleTask">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <intent-filter>
                <!--接收外部跳轉-->
                <action android:name="android.intent.action.VIEW" />
                <!--表示該頁面可以被隱式調用，必須加上該項-->
                <category android:name="android.intent.category.DEFAULT" />
                <!--如果希望該應用可以通過瀏覽器的連接啓動，則添加該項-->
                <category android:name="android.intent.category.BROWSABLE" />
                <data android:scheme="appb" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTask"></activity>
        <activity android:name=".BActivity"></activity>
        <activity android:name=".CActivity"></activity>
    </application>

</manifest>

package com.windfallsheng.myapplicationb;

import android.annotation.SuppressLint;
import android.app.ActivityManager;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.text.TextUtils;
import android.util.Log;
import android.widget.TextView;
import java.util.List;
import androidx.appcompat.app.AppCompatActivity;

public class WelcomeActivity extends AppCompatActivity {

    CodeReqCountDownTimer codeReqCountDownTimer;
    String type;

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        Log.d("appB", "WelcomeActivity#onNewIntent");
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);
        if (!this.isTaskRoot()) {
            Intent intent = getIntent();
            if (intent != null) {
                String action = intent.getAction();
                if (intent.hasCategory(Intent.CATEGORY_LAUNCHER) && Intent.ACTION_MAIN.equals(action)) {
                    Log.d("appB", "WelcomeActivity#onCreate#finish");
                    finish();
                }
            }
        }
        Uri data = getIntent().getData();
        Log.d("appB", "WelcomeActivity#onCreate#data=" + data);
        if (data != null) {
            String userName = data.getQueryParameter("userName");
            String targetPage = data.getQueryParameter("targetPage");
            type = data.getQueryParameter("type");
            Log.d("appB", "WelcomeActivity#onCreate#type=" + type + ", targetPage=" + targetPage+", userName=" + userName);
        }
        TextView tv = findViewById(R.id.textView);
        codeReqCountDownTimer = new CodeReqCountDownTimer(tv, 4 * 1000, 1000);
        codeReqCountDownTimer.start();

    }

    /**
     * 時間倒計時
     */
    class CodeReqCountDownTimer extends CountDownTimer {

        private TextView tv;

        public CodeReqCountDownTimer(TextView textView, long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
            this.tv = textView;
        }

        @Override
        public void onTick(long l) {
            String timeStr = l / 1000 + "s";
            tv.setText(timeStr);  //設置倒計時時間
        }

        @Override
        public void onFinish() {
            if (TextUtils.equals("1", type)) {
                tv.setText("即將進入B頁面");
            } else {
                tv.setText("即將進入主頁");
            }
            new Handler().postDelayed(new Runnable() {
                @SuppressLint("NewApi")
                @Override
                public void run() {
                    if (TextUtils.equals("1", type)) { // 經scheme喚起應用；
                        ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
                        //獲取activity任務棧,獲取任務棧列表
                        List<ActivityManager.AppTask> tasks = activityManager.getAppTasks();
                        tasks.stream().forEach(task -> {
                            ActivityManager.RecentTaskInfo info = task.getTaskInfo();
//            int taskId = info.taskId;
                            int activityCount = info.numActivities; //棧內Activity數量
                            String topActivity = info.topActivity.getClassName(); //棧頂Activity
                            String baseActivity = info.baseActivity.getClassName(); //棧底Activity
                            Log.d("appB", "WelcomeActivity#activityCount=" + activityCount + ", topActivity=" + topActivity + ", baseActivity=" + baseActivity);
                        });
                        if (tasks.size() == 1) {
                            int activityCount = tasks.get(0).getTaskInfo().numActivities;
                            Log.d("appB", "WelcomeActivity#activityCount=" + activityCount);
                            if (activityCount > 1) {// 目標應用已經被喚起的情況；
                                startActivity(new Intent(WelcomeActivity.this, BActivity.class));
                            } else { // 目標應用首次被喚起的情況；
                                Intent mainIntent = new Intent(WelcomeActivity.this, MainActivity.class);
                                Intent bIntent = new Intent(WelcomeActivity.this, BActivity.class);
                                //注意此處的順序
                                startActivities(new Intent[]{mainIntent, bIntent});
                            }
                        } else {// 目標應用已經被喚起的情況；
                            startActivity(new Intent(WelcomeActivity.this, BActivity.class));
                        }
                    } else {// 正常啓動應用；
                        startActivity(new Intent(WelcomeActivity.this, MainActivity.class));
                    }
                    WelcomeActivity.this.finish();
                }
            }, 1000);
        }

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        codeReqCountDownTimer.cancel();
        codeReqCountDownTimer = null;
    }
}

啓動頁中的：
startActivities(new Intent[]{mainIntent, bIntent});

這個方法是爲了解決瀏覽器首次喚起應用後，直接打開了目標分享頁面，用戶返回時沒有返回到B應用的主頁問題。

package com.windfallsheng.myapplicationb;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
import android.app.ActivityManager;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    @SuppressLint("NewApi")
    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        Log.d("appB", "MainActivity#onNewIntent");
        // 獲取activity任務棧
        ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        //獲取任務棧列表
        List<ActivityManager.AppTask> tasks = activityManager.getAppTasks();
        tasks.stream().forEach(task -> {
            ActivityManager.RecentTaskInfo info = task.getTaskInfo();
//            int taskId = info.taskId;
            int activityCount = info.numActivities; //棧內Activity數量
            String topActivity = info.topActivity.getClassName(); //棧頂Activity
            String baseActivity = info.baseActivity.getClassName(); //棧底Activity
            Log.d("appB", "MainActivity#onNewIntent#activityCount=" + activityCount + ", topActivity=" + topActivity + ", baseActivity=" + baseActivity);
        });
    }

    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.d("appB", "MainActivity#onCreate");
        // 獲取activity任務棧
        ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        //獲取任務棧列表
        List<ActivityManager.AppTask> tasks = activityManager.getAppTasks();
        tasks.stream().forEach(task -> {
            ActivityManager.RecentTaskInfo info = task.getTaskInfo();
//            int taskId = info.taskId;
            int activityCount = info.numActivities; //棧內Activity數量
            String topActivity = info.topActivity.getClassName(); //棧頂Activity
            String baseActivity = info.baseActivity.getClassName(); //棧底Activity
            Log.d("appB", "MainActivity#onCreate#activityCount=" + activityCount + ", topActivity=" + topActivity + ", baseActivity=" + baseActivity);
        });
    }

    public void goToPageB(View view) {
        startActivity(new Intent(this, BActivity.class));
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f2f2f2"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/selector_item_background"
        android:gravity="center"
        android:onClick="goToPageB"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:text="打開B頁面"
        android:textSize="35sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHeight_percent="0.15"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.5"
        app:layout_constraintWidth_percent="0.7" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="62dp"
        android:text="Main_Activity"
        android:textSize="30sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

package com.windfallsheng.myapplicationb;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import androidx.appcompat.app.AppCompatActivity;

public class BActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_b);
        Log.d("appB", "BActivity#onCreate");
    }

    public void goToPageC(View view) {
        startActivity(new Intent(this, CActivity.class));
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f2f2f2"
    tools:context=".BActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@drawable/selector_item_background"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintVertical_bias="0.5"
        app:layout_constraintWidth_percent="0.7"
        app:layout_constraintHeight_percent="0.15"
        android:paddingRight="10dp"
        android:paddingLeft="10dp"
        android:onClick="goToPageC"
        android:gravity="center"
        android:text="打開C頁面"
        android:textSize="35sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="62dp"
        android:text="B_Activity"
        android:textSize="30sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

package com.windfallsheng.myapplicationb;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import androidx.appcompat.app.AppCompatActivity;

public class CActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_c);
        Log.d("appB", "CActivity#onCreate");
    }

    public void goToPageMain(View view) {
        startActivity(new Intent(this, MainActivity.class));
    }

    public void goToPageB(View view) {
        startActivity(new Intent(this, BActivity.class));
    }

    public void goToPageWelcome(View view) {
        startActivity(new Intent(this, WelcomeActivity.class));
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f2f2f2"
    tools:context=".CActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="36dp"
        android:background="@drawable/selector_item_background"
        android:gravity="center"
        android:onClick="goToPageMain"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:text="打開Main頁面"
        android:textSize="35sp"
        app:layout_constraintBottom_toTopOf="@+id/textView3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHeight_percent="0.15"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView2"
        app:layout_constraintWidth_percent="0.7" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="37dp"
        android:background="@drawable/selector_item_background"
        android:gravity="center"
        android:onClick="goToPageB"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:text="打開B頁面"
        android:textSize="35sp"
        app:layout_constraintBottom_toTopOf="@+id/textView4"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHeight_percent="0.15"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView"
        app:layout_constraintWidth_percent="0.7" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="59dp"
        android:background="@drawable/selector_item_background"
        android:gravity="center"
        android:onClick="goToPageWelcome"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:text="打開Welcome頁面"
        android:textSize="35sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHeight_percent="0.15"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView3"
        app:layout_constraintWidth_percent="0.7" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="62dp"
        android:layout_marginBottom="58dp"
        android:paddingLeft="10dp"
        android:paddingRight="10dp"
        android:text="C_Activity"
        android:textSize="30sp"
        app:layout_constraintBottom_toTopOf="@+id/textView"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHeight_percent="0.15"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintWidth_percent="0.7" />

</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/shape_checked" android:state_checked="true"/>
    <item android:drawable="@drawable/shape_checked" android:state_selected="true"/>
    <item android:drawable="@drawable/shape_checked" android:state_focused="true"/>
    <item android:drawable="@drawable/shape_normal" />

</selector>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners android:radius="10dp"></corners>
    <solid android:color="#F6F6F6" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners android:radius="10dp"></corners>
    <solid android:color="#FFF" />
</shape>

由於作者水平有限，語言描述及代碼實現中難免有紕漏，望各位看官多提寶貴意見！

Hello , World !

感謝所有！

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