Activity和Service交互
本人常用的三种，不足之处希望大家多多提出宝贵意见
第一种Handler:
Activity
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import com.service.MsghdSeceiver;
public class MainHandlerActivity extends Activity {
private ProgressBar mProgressBar;
private Button btn;
private Intent intent;
@SuppressLint("HandlerLeak")
Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
if (msg.what == 0x123) {
// 拿到进度，更新UI
int progress = (int) msg.obj;
mProgressBar.setProgress(progress);
}
};
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_handler);
mProgressBar = (ProgressBar) findViewById(R.id.pb_mainhd_jindu);
btn = (Button) findViewById(R.id.btn_mainhd_btn);
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
MsghdSeceiver.setHandler(handler);
// 启动服务
intent = new Intent("com.example.communication.MSG_ACTIONhd");
}
@Override
protected void onResume() {
super.onResume();
setListener();
}
private void setListener() {
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
startService(intent);
}
});
}
@Override
protected void onDestroy() {
// 停止服务
stopService(intent);
super.onDestroy();
}
}
Service
import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
public class MsghdSeceiver extends Service {
/**
* 进度条的最大值
*/
public static final int MAX_PROGRESS = 100;
/**
* 进度条的进度值
*/
private int progress = 0;
private static Handler handlers;
public static void setHandler(Handler handler) {
handlers = handler;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
startDownLoad();
}
/**
* 模拟下载任务，每秒钟更新一次
*/
public void startDownLoad() {
new Thread(new Runnable() {
@Override
public void run() {
while (progress < MAX_PROGRESS) {
progress += 25;
Message message = new Message();
message.what = 0x123;
message.obj = progress;
handlers.sendMessage(message);
// Message.obtain(handlers, 0x123, progress).sendToTarget();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
}
注意
<service
android:name="com.service.MsghdSeceiver"
android:exported="false" >
<intent-filter>
<action android:name="com.example.communication.MSG_ACTIONhd" />
</intent-filter>
</service>
第二种接口:
Activity
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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import com.OnProgressListener;
import com.service.MsgService;
public class MainActivity extends Activity {
private MsgService msgService;
private ProgressBar mProgressBar;
private Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mProgressBar = (ProgressBar) findViewById(R.id.pb_main_jindu);
btn = (Button) findViewById(R.id.btn_main_btn);
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
// 绑定Service 需要注册<action
// android:name="com.example.communication.MSG_ACTION" />
Intent intent = new Intent("com.example.communication.MSG_ACTION");
bindService(intent, conn, BIND_AUTO_CREATE);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
setListener();
}
private void setListener() {
// TODO Auto-generated method stub
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
msgService.startDownLoad();
}
});
}
ServiceConnection conn = new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName arg0) {
// TODO Auto-generated method stub
msgService = null;
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
// 返回一个MsgService对象
msgService = ((MsgService.MsgBinder) service).getService();
// 注册回调接口来接收下载进度的变化
msgService.setOnProgressListener(new OnProgressListener() {
@Override
public void onProgress(int progress) {
// TODO Auto-generated method stub
mProgressBar.setProgress(progress);
}
});
}
};
@Override
protected void onDestroy() {
unbindService(conn);
super.onDestroy();
}
}
Service
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import com.OnProgressListener;
public class MsgService extends Service {
/**
* 进度条的最大值
*/
public static final int MAX_PROGRESS = 100;
/**
* 进度条的进度值
*/
private int progress = 0;
/**
* 更新进度的回调接口
*/
private OnProgressListener onProgressListener;
/**
* 注册回调接口的方法，供外部调用
*
* @param onProgressListener
*/
public void setOnProgressListener(OnProgressListener onProgressListener) {
this.onProgressListener = onProgressListener;
}
/**
* 增加get()方法，供Activity调用
*
* @return 下载进度
*/
public int getProgress() {
return progress;
}
/**
* 模拟下载任务，每秒钟更新一次
*/
public void startDownLoad() {
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
while (progress < MAX_PROGRESS) {
progress += 20;
// 进度发生变化通知调用方
if (onProgressListener != null) {
onProgressListener.onProgress(progress);
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
/**
* 返回一个Binder对象
*/
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return new MsgBinder();
}
public class MsgBinder extends Binder {
/**
* 获取当前Service的实例
*
* @return
*/
public MsgService getService() {
return MsgService.this;
}
}
}
接口
public interface OnProgressListener {
void onProgress(int progress);
}
注意
<service
android:name="com.service.MsgService"
android:exported="false" >
<intent-filter>
<action android:name="com.example.communication.MSG_ACTION" />
</intent-filter>
</service>
第三种广播:
Activity
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
public class MainGbActivity extends Activity {
private ProgressBar mProgressBar;
private Button btn;
private Intent mIntent;
private MsgReceiver msgReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_gb);
mProgressBar = (ProgressBar) findViewById(R.id.pb_maingb_jindu);
btn = (Button) findViewById(R.id.btn_maingb_btn);
}
@Override
protected void onStart() {
super.onStart();
// 启动服务
mIntent = new Intent("com.example.communication.MSG_ACTIONs");
// 动态注册广播接收器
msgReceiver = new MsgReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("com.example.communication.RECEIVER");
registerReceiver(msgReceiver, intentFilter);
}
@Override
protected void onResume() {
super.onResume();
setListener();
}
private void setListener() {
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
startService(mIntent);
}
});
}
/**
- 广播接收器
*/
public class MsgReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent intent) {
// 拿到进度，更新UI
int progress = intent.getIntExtra("progress", 0);
mProgressBar.setProgress(progress);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
// 停止服务
stopService(mIntent);
// 注销广播
unregisterReceiver(msgReceiver);
}
}Service
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
public class MsggbSeceiver extends Service {
/**- 进度条的最大值
*/
public static final int MAX_PROGRESS = 100;
/** - 进度条的进度值
*/
private int progress = 0;
private Intent intent = new Intent("com.example.communication.RECEIVER");
/** - 模拟下载任务，每秒钟更新一次
*/
public void startDownLoad() {
new Thread(new Runnable() {
@Override
public void run() {
while (progress < MAX_PROGRESS) {
progress += 25;
// 发送Action为com.example.communication.RECEIVER的广播
intent.putExtra("progress", progress);
sendBroadcast(intent);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
startDownLoad();
return super.onStartCommand(intent, flags, startId);
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
}
注意
<service
android:name="com.service.MsggbSeceiver"
android:exported="false" >
<intent-filter>
<action android:name="com.example.communication.MSG_ACTIONs" />
</intent-filter>
</service>
布局一样
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.activity.MainActivity$PlaceholderFragment" >
<ProgressBar
android:id="@+id/pb_mainhd_jindu"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/btn_mainhd_btn"
android:layout_marginTop="10dp"
android:text="HandlerService"
android:layout_below="@id/pb_mainhd_jindu"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
注解差不多都了，一看就应该懂，最好写一下，记忆会深点