Android开发视频教程第一季(Mars)

一个Intent对象包含了一组信息:

1. Component name
2. Action
3. Data
4. Catagory
5. Extras----都是键值对
6. Flags

 可以启动另一个Activiy:

Activity02.this.startActivity(intent);

视频中有句代码应改为

class MyButtonListener implements android.view.View.OnClickListener{

}

activity02.java中的代码应该为

package bxl.activity_02;

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

public class Activity02 extends Activity {
private Button myButton = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activity02);
myButton = (Button)findViewById(R.id.myButton);
myButton.setText(R.string.app_name);
myButton.setOnClickListener(new MyButtonListener());
}

class MyButtonListener implements android.view.View.OnClickListener{

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//生成一个Intent对象
Intent intent = new Intent();
intent.setClass(Activity02.this, OtherActivity.class);
Activity02.this.startActivity(intent);
}


}

}

 Intent可以调用不同应用程序中的Activity

发短信：

Uri uri=Uri.parse("smsto://18086241796");
Intent intent=new Intent(Intent.ACTION_SENDTO,uri);
intent.putExtra("sms_body", "The SMS text");
startActivity(intent);