Activity launchMode四分之三 ----singleTask
2016-01-01 16:44
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A Activity程序清单
package com.demo.activitylifecycle;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class AActivity extends Activity {
private static int mIndex = 1;
@Override
protected void onCreate(Bundle savedInstanceState) { // 创建Activity时被回调
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_a);
Log.i("ActivityLog", "A taskId: " + getTaskId() + "， A create："
+ mIndex);
++mIndex;
Button _AButton = (Button) findViewById(R.id.button1);
Button _BButton = (Button) findViewById(R.id.button2);
// 按钮点击事件，点击AActivity启动AActivity
_AButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(AActivity.this, AActivity.class);
startActivity(_intent);
}
});
// 按钮点击事件，点击BActivity启动BActivity
_BButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(AActivity.this, BActivity.class);
startActivity(_intent);
}
});
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Log.i("ActivityLog", " B onNewIntent");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("ActivityLog", "A taskId: " + getTaskId() + "， A destroy："
+ mIndex);
}
}
B Activity程序清单
package com.demo.activitylifecycle;
import android.app.Activity;
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;
import android.widget.TextView;
public class BActivity extends Activity {
private static int mIndex = 1;
@Override
protected void onCreate(Bundle savedInstanceState) { // 创建Activity时被回调
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_a);
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B create：" + mIndex);
++mIndex;
Button _AButton = (Button) findViewById(R.id.button1);
Button _BButton = (Button) findViewById(R.id.button2);
// 按钮点击事件，点击AActivity启动AActivity
_AButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(BActivity.this, AActivity.class);
startActivity(_intent);
}
});
// 按钮点击事件，点击BActivity启动BActivity
_BButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(BActivity.this, BActivity.class);
startActivity(_intent);
}
});
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText("B Activity");
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Log.i("ActivityLog", " B onNewIntent");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B destroy："
+ mIndex);
}
}
A Activity和B Activity布局程序清单
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}" >
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="A Activity" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView"
android:layout_marginTop="16dp"
android:text="AActivity" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/button1"
android:layout_below="@+id/button1"
android:layout_marginTop="14dp"
android:text="BActivity" />
</RelativeLayout>
Manifest程序清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.
4000
android.com/apk/res/android"
package="com.demo.activitylifecycle"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".AActivity"
android:label="AActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".BActivity"
android:label="BActivity"
android:launchMode="singleTask">
</activity>
</application>
</manifest>
小结：1、A Activity 和 B Activity 界面布局相同，A Activity启动A Activity，B Activity启动 B Activity 。
重载onCreate、onNewIntent、onDestroy
A Activity 的launchMode是standard（默认）
B Activity 的launchMode都是singleTop
2、创建Activity时打印log-----TaskID以及实例次数
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B create：" + mIndex);
3、启动A，再启动B，启动B，再启动A，再启动B
4、A Activity launchMode是standard，每启动一次Activity都生成一个Activity的实例，生成几个实例按back键几次才能返回到主界面
B Activity launchMode是singleTask，当B Activity生成实例后，再启动 B Activity不再重新生成实例，而是调用onNewIntent，按back键一次即可返回
A Activity程序清单
package com.demo.activitylifecycle;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class AActivity extends Activity {
private static int mIndex = 1;
@Override
protected void onCreate(Bundle savedInstanceState) { // 创建Activity时被回调
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_a);
Log.i("ActivityLog", "A taskId: " + getTaskId() + "， A create："
+ mIndex);
++mIndex;
Button _AButton = (Button) findViewById(R.id.button1);
Button _BButton = (Button) findViewById(R.id.button2);
// 按钮点击事件，点击AActivity启动AActivity
_AButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(AActivity.this, AActivity.class);
startActivity(_intent);
}
});
// 按钮点击事件，点击BActivity启动BActivity
_BButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(AActivity.this, BActivity.class);
startActivity(_intent);
}
});
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Log.i("ActivityLog", " B onNewIntent");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("ActivityLog", "A taskId: " + getTaskId() + "， A destroy："
+ mIndex);
}
}
B Activity程序清单
package com.demo.activitylifecycle;
import android.app.Activity;
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;
import android.widget.TextView;
public class BActivity extends Activity {
private static int mIndex = 1;
@Override
protected void onCreate(Bundle savedInstanceState) { // 创建Activity时被回调
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_a);
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B create：" + mIndex);
++mIndex;
Button _AButton = (Button) findViewById(R.id.button1);
Button _BButton = (Button) findViewById(R.id.button2);
// 按钮点击事件，点击AActivity启动AActivity
_AButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(BActivity.this, AActivity.class);
startActivity(_intent);
}
});
// 按钮点击事件，点击BActivity启动BActivity
_BButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(BActivity.this, BActivity.class);
startActivity(_intent);
}
});
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText("B Activity");
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Log.i("ActivityLog", " B onNewIntent");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B destroy："
+ mIndex);
}
}
A Activity和B Activity布局程序清单
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}" >
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="A Activity" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView"
android:layout_marginTop="16dp"
android:text="AActivity" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/button1"
android:layout_below="@+id/button1"
android:layout_marginTop="14dp"
android:text="BActivity" />
</RelativeLayout>
Manifest程序清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.demo.activitylifecycle"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".AActivity"
android:label="AActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".BActivity"
android:label="BActivity"
android:launchMode="singleTop">
</activity>
</application>
</manifest>
小结：1、A Activity 和 B Activity 界面布局相同，A Activity启动A Activity，B Activity启动 B Activity 。
重载onCreate、onNewIntent、onDestroy
A Activity 的launchMode是standard（默认）
B Activity 的launchMode都是singleTop
2、创建Activity时打印log-----TaskID以及实例次数
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B create：" + mIndex);
3、启动A，再启动B，启动B，再启动A，再启动B
4、A Activity launchMode是standard，每启动一次Activity都生成一个Activity的实例，生成几个实例按back键几次才能返回到主界面
B Activity launchMode是singleTop，当B Activity的实例在栈顶时，再启动 B Activity不再重新生成实例，而是调用onNewIntent，按back键一次即可返回
package com.demo.activitylifecycle;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class AActivity extends Activity {
private static int mIndex = 1;
@Override
protected void onCreate(Bundle savedInstanceState) { // 创建Activity时被回调
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_a);
Log.i("ActivityLog", "A taskId: " + getTaskId() + "， A create："
+ mIndex);
++mIndex;
Button _AButton = (Button) findViewById(R.id.button1);
Button _BButton = (Button) findViewById(R.id.button2);
// 按钮点击事件，点击AActivity启动AActivity
_AButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(AActivity.this, AActivity.class);
startActivity(_intent);
}
});
// 按钮点击事件，点击BActivity启动BActivity
_BButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(AActivity.this, BActivity.class);
startActivity(_intent);
}
});
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Log.i("ActivityLog", " B onNewIntent");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("ActivityLog", "A taskId: " + getTaskId() + "， A destroy："
+ mIndex);
}
}
B Activity程序清单
package com.demo.activitylifecycle;
import android.app.Activity;
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;
import android.widget.TextView;
public class BActivity extends Activity {
private static int mIndex = 1;
@Override
protected void onCreate(Bundle savedInstanceState) { // 创建Activity时被回调
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_a);
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B create：" + mIndex);
++mIndex;
Button _AButton = (Button) findViewById(R.id.button1);
Button _BButton = (Button) findViewById(R.id.button2);
// 按钮点击事件，点击AActivity启动AActivity
_AButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(BActivity.this, AActivity.class);
startActivity(_intent);
}
});
// 按钮点击事件，点击BActivity启动BActivity
_BButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(BActivity.this, BActivity.class);
startActivity(_intent);
}
});
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText("B Activity");
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Log.i("ActivityLog", " B onNewIntent");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B destroy："
+ mIndex);
}
}
A Activity和B Activity布局程序清单
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}" >
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="A Activity" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView"
android:layout_marginTop="16dp"
android:text="AActivity" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/button1"
android:layout_below="@+id/button1"
android:layout_marginTop="14dp"
android:text="BActivity" />
</RelativeLayout>
Manifest程序清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.
4000
android.com/apk/res/android"
package="com.demo.activitylifecycle"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".AActivity"
android:label="AActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".BActivity"
android:label="BActivity"
android:launchMode="singleTask">
</activity>
</application>
</manifest>
小结：1、A Activity 和 B Activity 界面布局相同，A Activity启动A Activity，B Activity启动 B Activity 。
重载onCreate、onNewIntent、onDestroy
A Activity 的launchMode是standard（默认）
B Activity 的launchMode都是singleTop
2、创建Activity时打印log-----TaskID以及实例次数
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B create：" + mIndex);
3、启动A，再启动B，启动B，再启动A，再启动B
4、A Activity launchMode是standard，每启动一次Activity都生成一个Activity的实例，生成几个实例按back键几次才能返回到主界面
B Activity launchMode是singleTask，当B Activity生成实例后，再启动 B Activity不再重新生成实例，而是调用onNewIntent，按back键一次即可返回
A Activity程序清单
package com.demo.activitylifecycle;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class AActivity extends Activity {
private static int mIndex = 1;
@Override
protected void onCreate(Bundle savedInstanceState) { // 创建Activity时被回调
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_a);
Log.i("ActivityLog", "A taskId: " + getTaskId() + "， A create："
+ mIndex);
++mIndex;
Button _AButton = (Button) findViewById(R.id.button1);
Button _BButton = (Button) findViewById(R.id.button2);
// 按钮点击事件，点击AActivity启动AActivity
_AButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(AActivity.this, AActivity.class);
startActivity(_intent);
}
});
// 按钮点击事件，点击BActivity启动BActivity
_BButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(AActivity.this, BActivity.class);
startActivity(_intent);
}
});
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Log.i("ActivityLog", " B onNewIntent");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("ActivityLog", "A taskId: " + getTaskId() + "， A destroy："
+ mIndex);
}
}
B Activity程序清单
package com.demo.activitylifecycle;
import android.app.Activity;
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;
import android.widget.TextView;
public class BActivity extends Activity {
private static int mIndex = 1;
@Override
protected void onCreate(Bundle savedInstanceState) { // 创建Activity时被回调
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_a);
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B create：" + mIndex);
++mIndex;
Button _AButton = (Button) findViewById(R.id.button1);
Button _BButton = (Button) findViewById(R.id.button2);
// 按钮点击事件，点击AActivity启动AActivity
_AButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(BActivity.this, AActivity.class);
startActivity(_intent);
}
});
// 按钮点击事件，点击BActivity启动BActivity
_BButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent _intent = new Intent(BActivity.this, BActivity.class);
startActivity(_intent);
}
});
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText("B Activity");
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Log.i("ActivityLog", " B onNewIntent");
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B destroy："
+ mIndex);
}
}
A Activity和B Activity布局程序清单
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}" >
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="A Activity" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView"
android:layout_marginTop="16dp"
android:text="AActivity" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/button1"
android:layout_below="@+id/button1"
android:layout_marginTop="14dp"
android:text="BActivity" />
</RelativeLayout>
Manifest程序清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.demo.activitylifecycle"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".AActivity"
android:label="AActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".BActivity"
android:label="BActivity"
android:launchMode="singleTop">
</activity>
</application>
</manifest>
小结：1、A Activity 和 B Activity 界面布局相同，A Activity启动A Activity，B Activity启动 B Activity 。
重载onCreate、onNewIntent、onDestroy
A Activity 的launchMode是standard（默认）
B Activity 的launchMode都是singleTop
2、创建Activity时打印log-----TaskID以及实例次数
Log.i("ActivityLog", "B taskId: " + getTaskId() + "，B create：" + mIndex);
3、启动A，再启动B，启动B，再启动A，再启动B
4、A Activity launchMode是standard，每启动一次Activity都生成一个Activity的实例，生成几个实例按back键几次才能返回到主界面
B Activity launchMode是singleTop，当B Activity的实例在栈顶时，再启动 B Activity不再重新生成实例，而是调用onNewIntent，按back键一次即可返回
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