Android中intent的使用
package com.duoguo.android;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
/**
* @author Administrator
*
*/
public class FirstActivity extends Activity {
/** Called when the activity is first created. */
@SuppressWarnings("unused")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView textView = (TextView) findViewById(R.id.myTextViewId);
Button button = (Button) findViewById(R.id.myButtonId);
button.setOnClickListener(new ButtonListener());// 添加事件监听器
}
class ButtonListener implements OnClickListener {
public void onClick(View v) {
Intent intent = new Intent();// 生成intent对象
intent.putExtra("name", "admin");// 传递相应的键值对
intent.setClass(FirstActivity.this, SecondActivity.class);// 请求到新的activity
FirstActivity.this.startActivity(intent);// 启动intent对象
}
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/myTextViewId" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="@string/myTextView" />
<Button android:id="@+id/myButtonId" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="@string/myButton" />
</LinearLayout>
/**
*
*/
package com.duoguo.android;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
/**
* @author Administrator
*
*/
public class SecondActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
TextView textView = (TextView) findViewById(R.id.intentTextViewId);
Intent intent = getIntent();// 获取intent对象
String value = intent.getStringExtra("name");// 获取键值对的值
textView.setText(value);
}
}
second.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/intentTextViewId"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="@string/secondTextView" />
</LinearLayout>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Android应用小程序</string>
<string name="myTextView">这是一段文本……</string>
<string name="myButton">这是一个按钮</string>
<string name="secondTextView">Intent的使用</string>
</resources>
AndroidMaifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.duoguo.android" android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="7" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".FirstActivity" 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=".SecondActivity" android:label="@string/app_name" />
</application>
</manifest>
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