Android的第一个程序

第一个程序：酷驴拨号器

首先建一个Android工程：phone

string.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, PhoneActivity!</string>
<string name="app_name">酷驴拨号器</string>
<string name="mobile">请输入手机号</string>
<string name="button">拨打此号码</string>
</resources>

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:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/mobile"
/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/mobile"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button"
android:id="@+id/button"
/>
</LinearLayout>

在drawable-hdpi中加入donkey.png，酷驴这张图片

PhoneActivity.Java

package cn.itcast.activity;

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

public class PhoneActivity extends Activity {
private EditText mobileText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mobileText = (EditText)this.findViewById(R.id.mobile);

Button button = (Button)this.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
String mobile = mobileText.getText().toString();
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + mobile)); //动作
PhoneActivity.this.startActivity(intent);
}
});
}
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="cn.itcast.activity"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/donkey" android:label="@string/app_name">
<activity android:name=".PhoneActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

</application>
<uses-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.CALL_PHONE"/>
</manifest>