Android 基于IntentService的文件下载的示例代码

package net.codepig.servicedownloaderdemo;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;public class MainActivity extends AppCompatActivity {  private String _url="http://www.boosj.com/apk/boosjDance.apk";  private EditText urlText;  private Button goBtn;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    goBtn=(Button) findViewById(R.id.goBtn);    urlText=(EditText) findViewById(R.id.urlText);    urlText.setText(_url);    goBtn.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View view) {        _url=urlText.getText().toString();        //start download        start_service();      }    });  }  public void start_service(){    //等会再填  }}