我正在尝试实现一个非常简单的服务示例。
用户通过 EditText 输入值并单击计算按钮。计算按钮会触发一个服务，该服务执行一些计算并将结果发送回另一个 EditText 框。
如果我使用没有绑定的简单服务，则在执行计算之前会显示结果，因此我想使用绑定服务。但就我而言，控件仅在 onBind 调用处停止，并且 onStart 不会执行。不过，控制确实流向了 onCreate。谁能帮我找出我哪里出错了？
public class SimpleService extends Service {
private final IBinder mBinder = new LocalBinder();
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
System.out.println("Service: OnBind");
return mBinder;
}
public class LocalBinder extends Binder {
SimpleService getService() {
System.out.println("Service: in Local binder");
return SimpleService.this;
}
}
@Override
public void onCreate() {
super.onCreate();
System.out.println(" Service:In on create...");
Toast.makeText(this,"Service created ...", Toast.LENGTH_LONG).show()
}
@Override
public void onDestroy() {
super.onDestroy();
System.out.println(" Service:in on destroy...");
Toast.makeText(this, "Service destroyed ...", Toast.LENGTH_LONG).show();
}
@Override
public void onStart(Intent intent, int startid) {
System.out.println("Service:in onstart command ...");
super.onStart(intent, startid);
int res;
String LOG_TAG = "";
int input2 = intent.getIntExtra("input", -1);
int mode = intent.getIntExtra("mode", -1);
String aString = Integer.toString(mode);
Log.v(LOG_TAG, aString);
if(mode == 1) {
res = cal_F(input2);
} else {
res = cal_C(input2);
}
intent.putExtra("result", res);
}
}
#
public class ClassExamplesServiceActivity extends Activity implements OnClickListener{
@Override
public void onClick(View v) {
input = Integer.parseInt(input1.getText().toString());
if(v.getId() == R.id.radio_fib)
rd_button = 0;
else if(v.getId() == R.id.radio_fact)
rd_button = 1;
else if (v.getId() == R.id.button1){
intent = new Intent(this, SimpleService.class);
intent.putExtra("input", input);
intent.putExtra("mode", rd_button);
doBindService();
System.out.println("in class activity "+System.currentTimeMillis());
}
else if(v.getId() == R.id.stop)
{
stopService(intent);
}
}
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
System.out.println("\n in service connection");
mBoundService = ((SimpleService.LocalBinder)service).getService();
}
public void onServiceDisconnected(ComponentName className) {
System.out.println("\n in service disconnected");
mBoundService = null;
}
};
void doBindService() {
System.out.println("in do bind service");
boolean isConnected = bindService(new Intent(ClassExamplesServiceActivity.this, SimpleService.class), mConnection, Context.BIND_AUTO_CREATE);
intent.putExtra("input", input);
intent.putExtra("mode", rd_button);
System.out.println("\n isconnected = "+ isConnected);
mIsBound = true;
}
void doUnbindService() {
if (mIsBound) {
res = intent.getIntExtra("result", -1);
result.setText(Integer.toString(res));// Set the result in the EditText
// Detach our existing connection.
unbindService(mConnection);
mIsBound = false;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
doUnbindService();
}
}
#
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".ClassExamplesServiceActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".SimpleService"></service>
</application>
