activity跳转时的生命周期

来源：互联网发布：数据库中的模式编辑：程序博客网时间：2024/04/30 20:17

概述

研究activity跳转时的生命周期，分完全覆盖的activity跳转，与不完全覆盖的

源代码 http://download.csdn.net/detail/yuxmdef1/6829217

生命周期

代码

MainActivity

package test.activitylife;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.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {private Button onPause;private Button onStop;private static final String TAG = MainActivity.class.getSimpleName();    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        findViews();        onPause.setOnClickListener(new OnClickListener() {public void onClick(View v) {Intent intent = new Intent(MainActivity.this, PauseActivity.class);startActivity(intent);}                });                onStop.setOnClickListener(new OnClickListener(){public void onClick(View v) {Intent intent = new Intent(MainActivity.this, OtherActivity.class);startActivity(intent);}                });        Log.v(TAG, "---------------onCreate--------------------");    }@Overrideprotected void onStart() {Log.v(TAG, "---------------onStart--------------------");super.onStart();}@Overrideprotected void onRestart() {Log.v(TAG, "---------------onRestart--------------------");super.onRestart();}@Overrideprotected void onResume() {Log.v(TAG, "---------------onResume--------------------");super.onResume();}@Overrideprotected void onPause() {Log.v(TAG, "---------------onPause--------------------");super.onPause();}@Overrideprotected void onStop() {Log.v(TAG, "---------------onStop--------------------");super.onStop();}@Overrideprotected void onDestroy() {Log.v(TAG, "---------------onDestroy--------------------");super.onDestroy();}public void findViews() {onPause = (Button)findViewById(R.id.dialog);onStop = (Button)findViewById(R.id.activity);}    }

OtherActivity

package test.activitylife;import android.app.Activity;import android.os.Bundle;import android.util.Log;public class OtherActivity extends Activity {private static final String TAG=OtherActivity.class.getSimpleName();@Overrideprotected void onCreate(Bundle savedInstanceState) {Log.v(TAG, "---------------onCreate--------------------");super.onCreate(savedInstanceState);}@Overrideprotected void onStart() {// TODO Auto-generated method stubLog.v(TAG, "---------------onStart--------------------");super.onStart();}@Overrideprotected void onRestart() {Log.v(TAG, "---------------onRestart--------------------");super.onRestart();}@Overrideprotected void onResume() {Log.v(TAG, "---------------onResume--------------------");super.onResume();}@Overrideprotected void onPause() {Log.v(TAG, "---------------onPause--------------------");super.onPause();}@Overrideprotected void onStop() {Log.v(TAG, "---------------onStop--------------------");super.onStop();}@Overrideprotected void onDestroy() {Log.v(TAG, "---------------onDestroy--------------------");super.onDestroy();}}

PauseActivity

package test.activitylife;import android.app.Activity;import android.os.Bundle;import android.util.Log;public class PauseActivity extends Activity {private static final String TAG=PauseActivity.class.getSimpleName();@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubLog.v(TAG, "---------------onCreate--------------------");super.onCreate(savedInstanceState);setContentView(R.layout.other);}@Overrideprotected void onStart() {Log.v(TAG, "---------------onStart--------------------");super.onStart();}@Overrideprotected void onRestart() {Log.v(TAG, "---------------onRestart--------------------");super.onRestart();}@Overrideprotected void onResume() {Log.v(TAG, "---------------onResume--------------------");super.onResume();}@Overrideprotected void onPause() {Log.v(TAG, "---------------onPause--------------------");super.onPause();}@Overrideprotected void onStop() {Log.v(TAG, "---------------onStop--------------------");super.onStop();}@Overrideprotected void onDestroy() {Log.v(TAG, "---------------onDestroy--------------------");super.onDestroy();}}

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="hello" /><Button    android:id="@+id/dialog"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="OnPause"    /><Button    android:id="@+id/activity"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="Onstop"    /></LinearLayout>

other.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" ></LinearLayout>

manifest

<?xml version="1.0" encoding="utf-8"?>  <manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="test.activitylife"      android:versionCode="1"      android:versionName="1.0" >        <uses-sdk android:minSdkVersion="9" />        <application          android:icon="@drawable/ic_launcher"          android:label="@string/app_name" >          <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=".OtherActivity"></activity>          <!-- dialog风格的Activity，没有完全覆盖当前Activity -->          <activity android:name=".PauseActivity" android:theme="@android:style/Theme.Dialog"></activity>      </application>    </manifest>

测试结果

OtherActivity完全覆盖MainActivity

点击 OnStop

可以发现在第二个activity的OnResume之后，第一个activity才OnStop,但是在第二个activity的Oncreate之前就执行了OnPause。也就是说只有在第二个activity完全起来之后才调用第一个activity的OnStop

按返回

PauseActivity不完全覆盖MainActivity

点击 OnPause

这里只调了第一个activity的OnPause，而没有调用OnStop

按返回

参考资料

http://blog.csdn.net/android_tutor/article/details/5772285

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