使用Service:
activity.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> <Button android:id="@+id/btnStartService" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="启动服务" /> <Button android:id="@+id/btnStopService" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="停止服务" /> </LinearLayout>
Mainactivity.java:
package com.imooc.learnservice; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; public class MainActivity extends AppCompatActivity { //第二种方式: private Intent intent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); intent = new Intent(MainActivity.this,MyService.class); findViewById(R.id.btnStartService).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startService(intent); } }); findViewById(R.id.btnStopService).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startService(intent); } }); //第一种方式: // findViewById(R.id.btnStartService).setOnClickListener(new View.OnClickListener() { // @Override // public void onClick(View v) { // startService(new Intent(MainActivity.this,MyService.class)); // } // }); // // findViewById(R.id.btnStopService).setOnClickListener(new View.OnClickListener() { // @Override // public void onClick(View v) { // startService(new Intent(MainActivity.this,MyService.class)); // } // }); } }
MyService.java:
package com.imooc.learnservice; import android.app.Service; import android.content.Intent; import android.os.IBinder; public class MyService extends Service { public MyService() { } @Override public IBinder onBind(Intent intent) { // TODO: Return the communication channel to the service. throw new UnsupportedOperationException("Not yet implemented"); } @Override public int onStartCommand(Intent intent, int flags, int startId) { new Thread() { @Override public void run() { super.run(); while (true) { System.out.println("服务正在进行..."); try { sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); return super.onStartCommand(intent, flags, startId); } }
AndroidManifes.xml:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.imooc.learnservice"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/Theme.LearnService"> <service android:name=".MyService" android:enabled="true" android:exported="true"></service> <activity android:name=".MainActivity" android:exported="true"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
绑定Service:
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> <Button android:id="@+id/btnStartService" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="启动服务" /> <Button android:id="@+id/btnStopService" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="停止服务" /> <Button android:id="@+id/btnBindService" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="绑定服务" /> <Button android:id="@+id/btnUnBindService" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="解除绑定服务" /> </LinearLayout>
MainActivity.java:
package com.imooc.learnservice; import androidx.appcompat.app.AppCompatActivity; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.os.Bundle; import android.os.IBinder; import android.view.View; public class MainActivity extends AppCompatActivity implements View.OnClickListener, ServiceConnection { //第二种方式: private Intent intent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); intent = new Intent(MainActivity.this,MyService.class); findViewById(R.id.btnStartService).setOnClickListener(this); findViewById(R.id.btnStopService).setOnClickListener(this); findViewById(R.id.btnBindService).setOnClickListener(this); findViewById(R.id.btnUnBindService).setOnClickListener(this); //要是有很多个按钮都需要运行这事件,那么可以用this来代替 //第一种方式: // findViewById(R.id.btnStartService).setOnClickListener(new View.OnClickListener() { // @Override // public void onClick(View v) { // startService(new Intent(MainActivity.this,MyService.class)); // } // }); // // findViewById(R.id.btnStopService).setOnClickListener(new View.OnClickListener() { // @Override // public void onClick(View v) { // startService(new Intent(MainActivity.this,MyService.class)); // } // }); } @Override public void onClick(View v) { switch (v.getId()){ case R.id.btnStartService: startService(intent); case R.id.btnStopService: stopService(intent); case R.id.btnBindService: bindService(intent,this, Context.BIND_AUTO_CREATE); case R.id.btnUnBindService: unbindService(this); break; } } @Override public void onServiceConnected(ComponentName name, IBinder service) { System.out.println("Service Connected"); } @Override public void onServiceDisconnected(ComponentName name) { } }
MyService.java:
package com.imooc.learnservice; import android.app.Service; import android.content.Intent; import android.os.Binder; import android.os.IBinder; public class MyService extends Service { public MyService() { } @Override public IBinder onBind(Intent intent) { // TODO: Return the communication channel to the service. return new Binder(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { new Thread() { @Override public void run() { super.run(); while (true) { System.out.println("服务正在进行..."); try { sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); return super.onStartCommand(intent, flags, startId); } }
Service生命周期:
package com.imooc.learnservice; import android.app.Service; import android.content.Intent; import android.os.Binder; import android.os.IBinder; public class MyService extends Service { private boolean serviceRunning = false; public MyService() { } @Override public IBinder onBind(Intent intent) { // TODO: Return the communication channel to the service. return new Binder(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { // new Thread() { // @Override // public void run() { // super.run(); // while (serviceRunning) { // System.out.println("服务正在进行..."); // // try { // sleep(1000); // } catch (InterruptedException e) { // e.printStackTrace(); // } // } // } // }.start(); System.out.println("OnSatrtCommand"); return super.onStartCommand(intent, flags, startId); } @Override public void onCreate() { super.onCreate(); System.out.println("service cerate"); new Thread() { @Override public void run() { super.run(); while (serviceRunning) { System.out.println("服务正在进行..."); try { sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); serviceRunning = true; } @Override public void onDestroy() { super.onDestroy(); System.out.println("service destory"); serviceRunning = false; } }