Android 测试生命周期的APP

三个布局文件：

activity_main.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_vertical" >                  
   
    <TextView 
        android:id="@+id/text_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="主Activty"
        />
    
    <Button 
        android:id="@+id/start_normal_activity"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="启动普通的Activity"
        />
    
    <Button 
        android:id="@+id/start_dialog_activity"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="启动对话式的Activity"
        />
    
  
</LinearLayout>

normal_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" >
    
    <TextView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="普通的Activity"
        />

</LinearLayout>

dialog_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" >
    
    <TextView 
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:layout_gravity="center_vertical"
        android:text="对话框式的Activity"
        />

</LinearLayout>

三个Activity，其他两个不用添加代码

public class MainActivity extends Activity {
    
    public static final String TAG = "MainActivity";
    
    Button startNormalActivity;
    Button startDialogActivity;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.v(TAG, "onCreate");
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        startNormalActivity = (Button) findViewById(R.id.start_normal_activity);
        startDialogActivity = (Button) findViewById(R.id.start_dialog_activity);
        startNormalActivity.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, NormalActivity.class);
                startActivity(intent);
            }
        });
        startDialogActivity.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, DialogActivity.class);
                startActivity(intent);
            }
        });
    }

    @Override
    protected void onStart() {
        super.onStart();
        Log.v(TAG, "onStart");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.v(TAG, "onResume");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Log.v(TAG, "onPause");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.v(TAG, "onStop");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.v(TAG, "onDestroy");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.v(TAG, "onRestart");
    } 
}

打开Eclipse启动APP，在LogCat输入tag:MainActivity，然后操作APP即可看到生命周期的变化。

如下图：

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