Android service生命周期详解

首先创建TestService.java服务：

import android.app.Service;import android.content.Intent;import android.os.Binder;import android.os.IBinder;import android.util.Log;import java.util.Random;public class TestService extends Service {    public class MyBinder extends Binder {        public TestService getService() {            return TestService.this;        }    }    private MyBinder binder = new MyBinder();    public int getRandomNumber() {        return new Random().nextInt();    }    @Override    public void onCreate() {        Log.e("buder", "TestService 执行 onCreate");        super.onCreate();    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        Log.e("buder", "TestService 执行 onStartCommand");        return START_NOT_STICKY;    }    @Override    public IBinder onBind(Intent intent) {        Log.e("buder", "TestService 执行 onBind");        return binder;    }    @Override    public boolean onUnbind(Intent intent) {        Log.e("buder", "TestService 执行 onUnbind");        sleepingOne();        return false;    }    @Override    public void onDestroy() {        Log.e("buder", "TestService 执行 onDestroy");        super.onDestroy();    }    private void sleepingOne(){        try {            Thread.sleep(10);        } catch (InterruptedException e) {            e.printStackTrace();        }    }}

AndroidManifest.xml的service配置：

MainActivity.java 开启或者绑定service服务的调用（显示启动和隐式启动）：

import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.os.IBinder;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private TestService service = null;    private boolean isBind = false;    ServiceConnection connection = new ServiceConnection() {        @Override        public void onServiceConnected(ComponentName name, IBinder binder) {            isBind = true;            TestService.MyBinder myBinder = (TestService.MyBinder) binder;            service = myBinder.getService();            Log.i("buder", "ActivityA 执行 onServiceConnected");            int num = service.getRandomNumber();            sleepingOne();            Log.i("buder", "ActivityA 执行 getRandomNumber = " + num);        }        @Override        public void onServiceDisconnected(ComponentName name) {            isBind = false;            Log.i("buder", "ActivityA 执行 onServiceDisconnected");        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Log.i("buder", "ActivityA 执行 onCreate");        findViewById(R.id.btnBindService).setOnClickListener(this);        findViewById(R.id.btnUnbindService).setOnClickListener(this);        findViewById(R.id.btnStartActivityB).setOnClickListener(this);        findViewById(R.id.btnFinish).setOnClickListener(this);    }    @Override    public void onClick(View v) {        if (v.getId() == R.id.btnBindService) {            //单击了“bindService”按钮            /**             * 显示启动service             *///            Intent intent = new Intent(this, TestService.class);//            intent.putExtra("from", "ActivityA");            Log.i("buder", "ActivityA 执行 bindService");            /**             * 隐式启动service             */            Intent intent = new Intent();            intent.putExtra("from", "ActivityA");            ComponentName componentName = new ComponentName(getPackageName(), "com.example.testservices.TestService");            intent.setComponent(componentName);//            startService(intent);            bindService(intent, connection, BIND_AUTO_CREATE);        } else if (v.getId() == R.id.btnUnbindService) {            //单击了“unbindService”按钮            if (isBind) {                Log.i("buder", "ActivityA 执行 unbindService");                unbindService(connection);            }        } else if (v.getId() == R.id.btnStartActivityB) {            //单击了“start ActivityB”按钮            Intent intent = new Intent(this, ActivityB.class);            Log.i("buder", "ActivityA 启动 ActivityB");            startActivity(intent);        } else if (v.getId() == R.id.btnFinish) {            //单击了“Finish”按钮            Log.i("buder", "ActivityA 执行 finish");            this.finish();        }    }    @Override    protected void onDestroy() {        super.onDestroy();        Log.i("buder", "ActivityA 执行 onDestroy");    }    private void sleepingOne(){        try {            Thread.sleep(10);        } catch (InterruptedException e) {            e.printStackTrace();        }    }}

测试使用的另外一个ActivityB.java：

import android.app.Activity;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.support.annotation.Nullable;import android.util.Log;import android.view.View;public class ActivityB extends Activity implements View.OnClickListener {    private TestService service = null;    private boolean isBind = false;    private ServiceConnection conn = new ServiceConnection() {        @Override        public void onServiceConnected(ComponentName name, IBinder binder) {            isBind = true;            TestService.MyBinder myBinder = (TestService.MyBinder) binder;            service = myBinder.getService();            Log.i("buder", "ActivityB 执行 onServiceConnected");            int num = service.getRandomNumber();            Log.i("buder", "ActivityB 执行 getRandomNumber = " + num);        }        @Override        public void onServiceDisconnected(ComponentName name) {            isBind = false;            Log.i("buder", "ActivityB 执行 onServiceDisconnected");        }    };    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_b);        findViewById(R.id.btnBindService).setOnClickListener(this);        findViewById(R.id.btnUnbindService).setOnClickListener(this);        findViewById(R.id.btnFinish).setOnClickListener(this);    }    @Override    public void onClick(View v) {        if (v.getId() == R.id.btnBindService) {            //单击了“bindService”按钮            Intent intent = new Intent(this, TestService.class);            intent.putExtra("from", "ActivityB");            Log.i("buder", "ActivityB 执行 bindService");            bindService(intent, conn, BIND_AUTO_CREATE);        } else if (v.getId() == R.id.btnUnbindService) {            //单击了“unbindService”按钮            if (isBind) {                Log.i("buder", "ActivityB 执行 unbindService");                unbindService(conn);            }        } else if (v.getId() == R.id.btnFinish) {            //单击了“Finish”按钮            Log.i("buder", "ActivityB 执行 finish");            this.finish();        }    }    @Override    public void onDestroy() {        super.onDestroy();        Log.i("buder", "ActivityB 执行 onDestroy");    }}

下面开始service生命周期的测试：

测试A：

1.MainActivity点击bind

2.MainActivity点击UNbind

Android service生命周期详解_第1张图片

测试B:

1.MainActivity的bind

2.MainActivity的finish

Android service生命周期详解_第2张图片

测试C：

1.MainActivity的bind

2.MainActivity的startActivityB

3.ActivityB的bind

4.ActivityB的unbind

5.ActivityB的finish

6.MainActivity的unbind

Android service生命周期详解_第3张图片

完整的项目地址：https://github.com/buder-cp/base_component_learn/tree/master/testservices

本博客参考：https://blog.csdn.net/iispring/article/details/48169339#quote