<android>第一行代碼 第二章源碼整理

一 ： FirstActivity.java

package com.example.activitytest;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.Toast;
import android.view.View.OnClickListener;

public class FirstActivity extends Activity{
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.first_layout);
        Button button1 = (Button) findViewById(R.id.button_1);
        //****test1
    //  button1.setOnClickListener(new OnClickListener(){
    //      @Override
    //      public void onClick(View v){
    //          Toast.makeText(FirstActivity.this,"You clicked Button 1", Toast.LENGTH_SHORT).show();
    //  button1.setOnClickListener(new OnClickListener(){
    //      @Override
    //****顯式Intent
    //      public void onClick(View v){
    //          Intent intent = new Intent(FirstActivity.this,SecondActivity.class);
    //          startActivity(intent);
    //****隱式Intent
    //  button1.setOnClickListener(new OnClickListener(){
    //      @Override
    //      public void onClick(View v){
    //          Intent intent =new Intent("com.example.activitytest.ACTION_START");
    //      startActivity(intent);  
        button1.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v){
    //          Intent intent =new Intent("com.example.activitytest.ACTION_START");
    //          intent.addCategory("com.example.activitytest.MY_CATEGORY");
    //          startActivity(intent);
    //***調用瀏覽器
    //          Intent intent =new Intent(Intent.ACTION_VIEW);
    //          intent.setData(Uri.parse("http://www.baidu.com"));
    //          startActivity(intent);
    //***調用系統撥號
    //          Intent intent =new Intent(Intent.ACTION_DIAL);
    //          intent.setData(Uri.parse("tel:10010"));
    //          startActivity(intent);
    //***向下一活動傳遞數據
    //          String data ="Hello SecondActivity";
    //          Intent intent=new Intent(FirstActivity.this,SecondActivity.class);
    //          intent.putExtra("extra_data", data);
    //          startActivity(intent);
    //***返回數據給上一個活動
                Intent intent=new Intent(FirstActivity.this,SecondActivity.class);
                startActivityForResult(intent,1);           
            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode,int resultCode,Intent data){
        switch(requestCode){
        case 1:
            if (resultCode==RESULT_OK){
                String returnedData =data.getStringExtra("data_return");
                Log.d("FirstActivity",returnedData);
            }
            break;
            default:
        }
    }
public boolean onCreateOptionsMenu(Menu menu){
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
public boolean onOptionsItemSelected(MenuItem item){
    switch (item.getItemId()){
    case R.id.add_item:
        Toast.makeText(this, "You clicked Add", Toast.LENGTH_SHORT).show();
        break;
    case R.id.remove_item:
        Toast.makeText(this, "You clicked Remove", Toast.LENGTH_SHORT).show();
        break;
        default:
    }
    return true;
    }
}

二 ： SecondActivity.java

package com.example.activitytest;

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;

public class SecondActivity extends Activity{
    @Override
    protected void onCreate(Bundle saveInstanceState){
        super.onCreate(saveInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.second_layout);
    //***向下一活動傳遞數據
    //  Intent intent =getIntent();
    //  String data = intent.getStringExtra("extra_data");
    //  Log.d("SecondActivity",data);
    //***返回數據給上一個活動
        Button button2 =(Button) findViewById(R.id.button_2);
        button2.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v){
                Intent intent = new Intent();
                intent.putExtra("data_return","Hello FirstActivity");
                setResult(RESULT_OK,intent);
                finish();
            }
        });
        }
    @Override
    public void onBackPressed(){
        Intent intent =new Intent();
        intent.putExtra("data_return", "Hello FirstActivity");
        setResult(RESULT_OK, intent);
        finish();
    }

}

三　：　ThirdActivity.java

package com.example.activitytest;

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;

public class ThirdActivity extends Activity{
    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.third_layout);

}
}

四 ： BaseActivity

package com.example.activitytest;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class BaseActivity extends Activity{
    @Override
    protected void onCreate(Bundle saveInstanceState){
        super.onCreate(saveInstanceState);
        Log.d("BaseActivity",getClass().getSimpleName());
        ActivityCollector.addActivity(this);
    }
    @Override
    protected void onDestroy(){
        super.onDestroy();
        ActivityCollector.removeActivity(this);
    }
}

五 ：ActivityCollector

package com.example.activitytest;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;

public class ActivityCollector {
    public static List<Activity> activities = new ArrayList<Activity>();
    public static void addActivity(Activity activity){
        activities.add(activity);
    }
    public static void removeActivity(Activity activity){
        activities.remove(activity);
    }
    public static void finishAll(){
        for(Activity activity:activities){
            if (!activity.isFinishing()){
                activity.finish();
            }
        }
    }
}

六　：　AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.activitytest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/logo"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity 
            android:name=".FirstActivity"
            android:label="This is my first activity">
            <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.activitytest.ACTION_START"/>
                    <category android:name="android.intent.category.DEFAULT"/>
                    <category android:name="com.example.activitytest.MY_CATEGORY"/>
                </intent-filter>
        </activity>
        <activity android:name=".ThirdActivity">
            <intent-filter>
                <action android:name="android.intent.action.VIEW"/>
                <category android:name="android.intent.category.DEFAULT"/>
                <data android:scheme="http"/>
            </intent-filter>
        </activity>
    </application>

</manifest>

七　：　first_layout.xml

<?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" >
    <Button 
        android:id="@+id/button_1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 1"
        />

</LinearLayout>

八： second_layout.xml

<?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" >
   <Button 
       android:id="@+id/button_2"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:text="Button 2"/> 
</LinearLayout>

九 ： third_layout.xml

<?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" >
    <Button
        android:id="@+id/button_3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 3"
        />

</LinearLayout>

menu/main.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
  <item
      android:id="@+id/add_item"
      android:title="Add"/>
  <item 
      android:id="@+id/remove_item"
      android:title="Remove"/>  

</menu>

完。