android alertDialog 使用

描述：点击button，弹出对话框；另外ImageView显示图片

包含四个文件：main.xml，MainActivity，androidManifest.xml

1.main.xml文件内容

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    

<Button 

   android:layout_width="200dp"

   android:layout_height="100dp"

   android:id="@+id/button1" >

</Button>

<ImageView 

   android:layout_width="200dp"

   android:layout_height="100dp"

   android:id="@+id/imageView1">

</ImageView>

</LinearLayout>

2.MainActivity

public class MainActivity extends Activity {

public Button mButton;

public ImageView mImageView;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

mButton = (Button) findViewById(R.id.button1);

mImageView = (ImageView) findViewById(R.id.imageView1);

mImageView.setImageResource(R.drawable.ic_launcher);

mButton.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Dialog alertDialog = new AlertDialog.Builder(MainActivity.this).

setTitle(R.string.dialog_title).

setMessage(R.string.dialog_content).

setIcon(R.drawable.ic_launcher).

setPositiveButton(R.string.button_content, null).

setNegativeButton("Cancel", null).

create();

alertDialog.show();

}

});

}

}

3.string.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">TestAlertDialog</string>

    <string name="title_activity_main">MainActivity</string>

    <string name="hello_world">Hello world!</string>

    <string name="action_settings">Settings</string>

    <string name="dialog_title">演示框</string>

    <string name="dialog_content">Hello, this world</string>

    <string name="button_content">确定</string>

</resources>

4.androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.xinhua.test"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="19" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity android:name=".MainActivity" >

           <intent-filter>

               <action android:name="android.intent.action.MAIN" />

               <category android:name="android.intent.category.LAUNCHER" />

           </intent-filter>

        </activity>

    </application>

</manifest>

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