android activity 生命周期测试

android  activity 测试
测试结果 正常情况下

1	一个activity从创建到显示调用顺序	onCreate->onStart->onResume //onResume开始时也会被调用,写在onResume中应只有恢复显示和创建共有的代码
2	按返回键退出activity	onPause->onStop->onDestroy
3	从应用管理中“强行停止”	onPause->onStop //无Destroy
4	按返回退出后长按home键调出应用 或 点击应用重新进入	onCreate->onStrat->onResume
5	按主页键退出 然后长按home键调出应用 或 点击应用重新进	onStrat->onResume //按主页键挂后台 无需onCreate
6	finish()操作	onPause->onStop->onDestroy
7	menu,submenu,dialog显示并返回	无操作 //无onPause
8	切换到另一个activity	1.onPause->2.onCreate->2.onStart->2.onResume->1.onStop //居然是切换着来的
9	8步骤后 按返回键	2.onPause->1.onStart->1.onResume->2.onStop->2.onDestroy //疑问：什么时候单独用onResume?
10	9步骤后 切换到同一个activity	1.onPause->2.onCreate->2.onStart->2.onResume->1.onStop
11	10步骤后 按主页键返回	2.onPause->2.onStop
12	11步骤后 重新点击应用进入	2.onStart->2.onResume
13	应用中来电	onPause->onStop //同activity切换
14	13步骤 后挂断返回应用	onStart->onResume //同activity切换
15	当activity2 设置 android:theme="@android:style/Theme.Dialog" 切换到activity2显示	1.onPause->2.onCreate->2.onStart->2.onResume->2.onStop->2.onDestroy
16	15步骤后 按返回键返回	2.onPause->1.onResume //应该注意一下 Destroy后才调用的pause.

测试结论

1	activity从创建到显示	onCreate->onStart->onResume
2	activity finish或者是按返回键 使其不显示	onPause->onStop->onDestroy //重新进入需要onCreate->onStart->onResume
3	activity 按主页键不显示	onPause->onStop //重新进入只需要onStart->onResume
4	activity间切换	1.onPause->2.onCreate->2.onStart->2.onResume->1.onStop
5	4步骤后按返回键返回前一个activity	2.onPause->1.onStart->1.onResume->2.onStop->onDestroy //下次再intent进入 得onCreate
6	menu dialog	无任何操作 //有些说的不可交互时调用onPause 奇怪 应该是我理解错了？
7	打开一个 android:theme="@android:style/Theme.Dialog" 的activity	1.onPause->2.onCreate->2.onStart->2.onResume->2.onStop->2.onDestroy ；注意：直接调用onStop onDestroy
8	7步骤后按返回键回到前一个activity	2.onPause->1.onResume//直接调用onPause 真乱 估计还有其他特殊情况

测试用代码
activity1.java

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.SubMenu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class activity1 extends Activity {
    /** Called when the activity is first created. */
    String a="activity_1";
    AlertDialog.Builder builder;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.v(a,"onCreate");
        Button Btn_Destory=(Button)findViewById(R.id.Btn_Destory);
        Btn_Destory.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                finish();
            }
        });

        builder =new Builder(this);
        builder.setTitle("title");
        builder.setMessage("message");
        builder.setPositiveButton("text", new DialogInterface.OnClickListener(){

            @Override
            public void onClick(DialogInterface dialog, int id) {
                // TODO Auto-generated method stub
                dialog.dismiss();
            }

        });


        Button Btn_Dialog=(Button)findViewById(R.id.Btn_Dialog);
        Btn_Dialog.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                builder.show();
            }
        });

        Button Btn_Intent=(Button)findViewById(R.id.Btn_Intent);
        Btn_Intent.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View view) {
                // TODO Auto-generated method stub

                startActivity2();
            }

        });

    }
    public void onStart(){
        Log.v(a,"onStart");
        super.onStart();
    }
    public void onResume(){
        Log.v(a,"onResume");
        super.onResume();
    }
    public void onPause(){
        Log.v(a,"onPause");
        super.onPause();
    }
    public void onStop(){
        Log.v(a,"onStop");
        super.onStop();
    }
    public void onDestroy(){
        Log.v(a,"onDestory");
        super.onDestroy();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        menu.add(0, 1, 1, "menu_1");
        menu.add(0, 2, 2, "menu_2");
        SubMenu subMenu = menu.addSubMenu(1, 100, 100, "submenu");
        subMenu.add(2, 101, 101, "submenu_1");
        subMenu.add(2, 102, 102, "submenu_2");
        return true;
    }
    public void startActivity2(){
        Intent intent=new Intent(activity1.this,activity_2.class);
        this.startActivity(intent);
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
    <Button
        android:id="@+id/Btn_Destory"
        android:text="finish"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
    <Button
        android:id="@+id/Btn_Dialog"
        android:text="Dialog"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
    <Button
        android:id="@+id/Btn_Intent"
        android:text="Intent"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
            />
</LinearLayout>

activity2.java

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

public class activity_2 extends Activity{
    String a="activity_2";
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        Log.v(a,"onCreate");
        setContentView(R.layout.main2);
    }
    public void onStart(){
        Log.v(a,"onStart");
        super.onStart();
    }
    public void onResume(){
        Log.v(a,"onResume");
        super.onResume();
    }
    public void onPause(){
        Log.v(a,"onPause");
        super.onPause();
    }
    public void onStop(){
        Log.v(a,"onStop");
        super.onStop();
    }
    public void onDestroy(){
        Log.v(a,"onDestory");
        super.onDestroy();
    }
}

main2.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="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />
</LinearLayout>