Android使用ComponentName组件简单示例

package com.example.test;

import android.os.Bundle;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn = (Button) findViewById(R.id.btn);
btn.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
//1.利用setClass
//intent.setClass(MainActivity.this, SencondActivity.class);
//2.利用setComponent ComponentName的第一个参数必须是application's package name,也是主配置文件Manifest里设置好的包名
ComponentName name = new ComponentName(getPackageName(), SencondActivity.class.getName());
intent.setComponent(name);
startActivity(intent);
}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}

}