在Android中如何侦听Service内部的状态

来源：互联网发布：电脑程序编程培训编辑：程序博客网时间：2024/06/05 15:45

第一步，在MainActivity中：

package com.example.yangjian.connectservice;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.os.Message;import android.support.v7.app.ActionBarActivity;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.EditText;import android.widget.TextView;public class MainActivity extends ActionBarActivity implements View.OnClickListener, ServiceConnection {    private EditText etData;    private MyService.Binder binder = null;    private TextView tvOut;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        etData = (EditText) findViewById(R.id.etData);        tvOut = (TextView) findViewById(R.id.tvOut);        findViewById(R.id.btnStartService).setOnClickListener(this);        findViewById(R.id.btnStopService).setOnClickListener(this);        findViewById(R.id.btnBindService).setOnClickListener(this);        findViewById(R.id.btnUnbindService).setOnClickListener(this);        findViewById(R.id.btnSyncData).setOnClickListener(this);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.menu_main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        //noinspection SimplifiableIfStatement        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.btnStartService:                Intent i = new Intent(this, MyService.class);                i.putExtra("data", etData.getText().toString());                startService(i);                break;            case R.id.btnStopService:                stopService(new Intent(this, MyService.class));                break;            case R.id.btnBindService:                bindService(new Intent(this, MyService.class), this, Context.BIND_AUTO_CREATE);                break;            case R.id.btnUnbindService:                unbindService(this);                break;            case R.id.btnSyncData:                if (binder != null) {                    binder.setData(etData.getText().toString());                }                break;        }    }    @Override    public void onServiceConnected(ComponentName name, IBinder service) {        binder = (MyService.Binder)service;        binder.getService().setCallback(new MyService.Callback() {            @Override            public void onDataChange(String data) {                Message msg = new Message();                Bundle b = new Bundle();                b.putString("data", data);                msg.setData(b);                handler.sendMessage(msg);            }        });    }    @Override    public void onServiceDisconnected(ComponentName name) {    }    private android.os.Handler handler = new android.os.Handler(){        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            tvOut.setText(msg.getData().getString("data"));        }    };}

第二步，在MyService中：

package com.example.yangjian.connectservice;import android.app.Service;import android.content.Intent;import android.os.IBinder;public class MyService extends Service {    private boolean running = false;    private String data = "information";    public MyService() {    }    @Override    public IBinder onBind(Intent intent) {        return new Binder();    }    public class Binder extends android.os.Binder{        public void setData(String data) {            MyService.this.data = data;        }        public MyService getService() {            return MyService.this;        }    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        data = intent.getStringExtra("data");        return super.onStartCommand(intent, flags, startId);    }    @Override    public void onCreate() {        super.onCreate();        running = true;        new Thread(){            @Override            public void run() {                super.run();                int i=0;                while (running) {                    i++;                    String str = i+":"+data;                    System.out.println(str);  //指明是第几次执行                    if (callback != null) {                        callback.onDataChange(str);                    }                                        try {                        sleep(1000);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                }            }        }.start();    }    @Override    public void onDestroy() {        super.onDestroy();        running = false;    }    private Callback callback = null;    public static interface Callback {        void onDataChange(String data);    }    public void setCallback(Callback callback) {        this.callback = callback;    }    public Callback getCallback() {        return callback;    }}

在MainXml中：

<LinearLayout 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" android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context=".MainActivity">    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:id="@+id/tvOut"/>    <EditText        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="默认信息"        android:id="@+id/etData"/>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="启动服务"        android:id="@+id/btnStartService"/>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="停止服务"        android:id="@+id/btnStopService"/>    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="绑定服务"        android:id="@+id/btnBindService" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="解除绑定服务"        android:id="@+id/btnUnbindService" />    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="同步数据"        android:id="@+id/btnSyncData" /></LinearLayout>

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