通过Intent传递数据

通过Intent类中的putExtra方法可以将简单的数据类型和序列化对象保存到Intent对象中，然后在目标的Activity中使用getXxx方法取出对应的数据。

主要包括以下内容：MainActivity.java、OtherActivity.java（新建的基于Android Activity的java类）、factivity_main.xml、other.xml、AndroidMainFest.xml

MainActivity.java

package com.example.pro4;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);//加载布局文件
button=(Button)this.findViewById(R.id.button);//
button.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//点击按钮时触发一个意图
Intent intent=new Intent(MainActivity.this,OtherActivity.class);
//在意图中传递数据
intent.putExtra("name", "张三");
intent.putExtra("age",23);
intent.putExtra("address", "Beijing");
//启动意图
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.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}

OtherActivity.java

package com.example.pro4;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class OtherActivity extends Activity {

private TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.other);
textView = (TextView) this.findViewById(R.id.msg);
setContentView(R.layout.other);
textView = (TextView)this.findViewById(R.id.msg);//获取文本框
Intent intent = getIntent();//获取意图对象
Integer age = intent.getIntExtra("age", 0);//获取意图对象数据
String name = intent.getStringExtra("name"); //获取意图对象数据
String address = intent.getStringExtra("address");//获取意图对象数据
textView.setText("age--->>"+age+"\n"+"name--->>"+name+"\n"+"address--->>"+address);//设置到文本框

}

}

res下的布局文件layout下

factivity_main.xml

other.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/msg"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</TextView>
</LinearLayout>

AndroidMainFest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.pro4"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="17"
android:targetSdkVersion="17" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".OtherActivity"></activity>
</application>

</manifest>

通过Intent传递数据

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