功能
創建5個按鈕,隱式啓動、發短信、撥號按鈕、電話按鈕、打開網頁按鈕。通過使用Intent來完成各自按鈕下的功能
代碼目錄如下
詳細代碼如下:
activity_main.xml代碼如下
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="隱式啓動" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="發短信" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="撥號按鈕" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="電話按鈕" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2">
<Button
android:id="@+id/button5"
android:layout_width="match_parent"
android:layout_height="192dp"
android:text="打開百度網頁"
/>
</LinearLayout>
</LinearLayout>
firstlayout.xml代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="這是第二個界面"/>
</LinearLayout>
MainActivity.java代碼如下:
package com.example.administrator.chang;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button1= (Button) findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent =new Intent("com.example.administrator.chang.ACTION_START");
startActivity(intent);
}
});
//發短信
Button button2= (Button) findViewById(R.id.button2);
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_SENDTO);
intent.setData(Uri.parse("smsto:10086"));
intent.putExtra("sms_body","The SMS text");
startActivity(intent);
}
});
// 撥號
Button button3= (Button) findViewById(R.id.button3);
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent =new Intent();
intent.setAction(Intent.ACTION_DIAL);
intent.setData(Uri.parse("tel:10086"));
startActivity(intent);
}
});
//打電話
Button button4= (Button) findViewById(R.id.button4);
button4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent();
intent.setAction(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:10086"));
startActivity(intent);
}
});
Button button5= (Button) findViewById(R.id.button5);
button5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(Uri.parse("http://www.baidu.com"));
startActivity(intent);
}
});
}
}
SecondActivity.java代碼如下:
package com.example.administrator.chang;
import android.app.Activity;
import android.os.Bundle;
/**
* Created by Administrator on 2015/8/19.
*/
public class SecondActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.firstlayout);
}
}
AndroidManifest.xml代碼如下:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.administrator.chang">
<uses-permission android:name="android.permission.CALL_PHONE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SecondActivity">
<intent-filter>
<action android:name="com.example.administrator.chang.ACTION_START" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
說明 :打電話按鈕中需要添加用戶權限,具體代碼部分是
<uses-permission android:name="android.permission.CALL_PHONE" />
發短信按鈕我用的是intent.setAction(Intent.ACTION_SENDTO);如過短信直接能發送出去需要添加用戶權限
android.permission.SEND_SMS
在安卓中嚴格區分大小寫。例如下面兩段代碼代表不同的意思:
<categoryandroid:name="android.intent.category.LAUNCHER" />
<category android:name="ANDROID.INTENT.CATEGORY.LAUNCHER" />
結果如下:
主頁面:
點擊隱式啓動後跳轉到第二個頁面
點擊發送短信跳轉到發送短信頁面
點擊撥號按鈕跳轉到系統撥號界面
點擊電話按鈕跳轉到通話界面
點擊打開百度網頁按鈕跳轉到百度網站