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(){@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubfinish();}        });                builder =new Builder(this);        builder.setTitle("title");        builder.setMessage("message");        builder.setPositiveButton("text", new DialogInterface.OnClickListener(){@Overridepublic void onClick(DialogInterface dialog, int id) {// TODO Auto-generated method stubdialog.dismiss();}                });                        Button Btn_Dialog=(Button)findViewById(R.id.Btn_Dialog);        Btn_Dialog.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {// TODO Auto-generated method stubbuilder.show();}        });                Button Btn_Intent=(Button)findViewById(R.id.Btn_Intent);        Btn_Intent.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View view) {// TODO Auto-generated method stubstartActivity2();}                });            }    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>

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