Android Studio開(kāi)發(fā)基礎(chǔ)之啟動(dòng)Service，并通過(guò)從Activity向Service傳遞數(shù)據(jù)

本實(shí)例演示啟動(dòng)Service，并通過(guò)從Activity向Service傳遞數(shù)據(jù)，新建一個(gè)Service，并敲如下代碼：

package com.example.lhb.startservice;

import android.app.Service;

import android.content.Intent;

import android.os.IBinder;

import android.view.ViewDebug;

import android.widget.Toast;

public class MyService extends Service {

private boolean Running=false;

private String data="默認(rèn)信息！！！";

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) {

data=intent.getStringExtra("data");//這里的intent是參數(shù)里的，不是自定義的

return super.onStartCommand(intent, flags, startId);

}

@Override

public void onCreate() {

super.onCreate();

Running=true;

new Thread(){

@Override

public void run() {

super.run();

while (Running){

System.out.println(data);

try {

sleep(3000);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}.start();

}

@Override

public void onDestroy() {

super.onDestroy();

Running=false;

}

}主程序代碼：

package com.example.lhb.startservice;

import android.content.Intent;

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

private EditText inputText;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

findViewById(R.id.btnStartService).setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

inputText= (EditText) findViewById(R.id.inputText);

if(inputText.getText().length()==0){

Toast.makeText(MainActivity.this,"請(qǐng)輸入傳遞的值！",Toast.LENGTH_SHORT).show();

return;

}

Intent intent;

intent=new Intent(MainActivity.this,MyService.class);

intent.putExtra("data",inputText.getText().toString());

startService(intent);

}

});

findViewById(R.id.btnStopService).setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Intent intent;

intent=new Intent(MainActivity.this,MyService.class);

stopService(intent);

}

});

}

}

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