[Android开发学习20]多个Activity间的交互之Intent

一、基础知识:

1.一个Intent对象包含了一组信息：
1. Component name 指定启动的Activity
2. Action 要做什么
3. Data 传送数据
4. Category
5. Extras 键值对
6. Flags

2.Intent基本用法:

[java] view plaincopyprint?// 生成一个Intent对象
Intent intent = new Intent();
intent.putExtra("testIntent", "123");   // 传递数据
intent.setClass(Activity_02.this, OtherActivity.class); // 指定跳向哪一个Activity(第二个参数)
//Activity_02.this.startActivity(intent);
startActivity(intent);

// 生成一个Intent对象
Intent intent = new Intent();
intent.putExtra("testIntent", "123"); // 传递数据
intent.setClass(Activity_02.this, OtherActivity.class); // 指定跳向哪一个Activity(第二个参数)
//Activity_02.this.startActivity(intent);
startActivity(intent);

[java]
// 接收Intent传过来的数据
Intent intent = getIntent();
String value = intent.getStringExtra("testIntent"); // 接收Intent的数据
myTextView = (TextView)findViewById(R.id.myTextView);
//myTextView.setText(R.string.other);
myTextView.setText(value);

// 接收Intent传过来的数据
Intent intent = getIntent();
String value = intent.getStringExtra("testIntent"); // 接收Intent的数据
myTextView = (TextView)findViewById(R.id.myTextView);
//myTextView.setText(R.string.other);
myTextView.setText(value);
3.按钮事件的注册:

[java]
private Button myButton = null;
myButton = (Button)findViewById(R.id.myButton);
myButton.setOnClickListener(new MyButtonListener());

class MyButtonListener implements OnClickListener{

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        // 生成一个Intent对象
        Intent intent = new Intent();
        intent.putExtra("testIntent", "123");   // 传递数据
        intent.setClass(Activity_02.this, OtherActivity.class); // 指定跳向哪一个Activity(第二个参

数)
        //Activity_02.this.startActivity(intent);
        startActivity(intent);

        /*
        Uri uri = Uri.parse("smsto:0800000123");
        Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
        intent.putExtra("sms_body", "The SMS text");
        startActivity(intent);
         */
    }
}

private Button myButton = null;
myButton = (Button)findViewById(R.id.myButton);
myButton.setOnClickListener(new MyButtonListener());

class MyButtonListener implements OnClickListener{

@Override
public void onClick(View v) {
  // TODO Auto-generated method stub
  // 生成一个Intent对象
  Intent intent = new Intent();
  intent.putExtra("testIntent", "123"); // 传递数据
  intent.setClass(Activity_02.this, OtherActivity.class); // 指定跳向哪一个Activity(第二个参

数)
  //Activity_02.this.startActivity(intent);
  startActivity(intent);

  /*
  Uri uri = Uri.parse("smsto:0800000123");
  Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
  intent.putExtra("sms_body", "The SMS text");
  startActivity(intent);
   */
}
}

二、代码展示:

1."Activity_02\src\yan\activity_02\Activity_02.java"

[java]
package yan.activity_02;

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

public class Activity_02 extends Activity {
    private Button myButton = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_02);
        myButton = (Button)findViewById(R.id.myButton);
        myButton.setOnClickListener(new MyButtonListener());
    }

    class MyButtonListener implements OnClickListener{

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            // 生成一个Intent对象

            Intent intent = new Intent();
            intent.putExtra("testIntent", "123");
            intent.setClass(Activity_02.this, OtherActivity.class);
            //Activity_02.this.startActivity(intent);
            startActivity(intent);

            /*
            Uri uri = Uri.parse("smsto:0800000123");
            Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
            intent.putExtra("sms_body", "The SMS text");
            startActivity(intent);
             */
        }

    }
}

package yan.activity_02;

import android.net.Uri;
import android.os.Bu

补充：移动开发 , Android ,