Android入门之简单拨号器

效果图：

package jk.phone;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;import android.widget.EditText;public class MainActivity extends Activity {protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button button = (Button)this.findViewById(R.id.callButton);button.setOnClickListener(new ButtonOnClickListener());}private final class ButtonOnClickListener implements OnClickListener{@Overridepublic void onClick(View v) {      EditText mobileText =(EditText)findViewById(R.id.mobileText);      String mobileNumber = mobileText.getText().toString();      Intent intent = new Intent();      intent.setAction("android.intent.action.CALL");      intent.setData(Uri.parse("tel:"+mobileNumber));      startActivity(intent);}}@Overridepublic 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;}}

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context=".MainActivity" >    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"         android:text="@string/mobileText" />    <EditText        android:id="@+id/mobileText"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:ems="10"       >    </EditText>    <Button        android:id="@+id/callButton"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/callButton" /></LinearLayout>

strings.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="app_name">Phone</string>    <string name="action_settings">Settings</string>    <string name="callButton">拨号</string>    <string name="mobileText">请输入要拨打的号码</string></resources>

androidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="jk.phone"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="18" /> <uses-permission android:name="android.permission.CALL_PHONE"/>    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="jk.phone.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>            </application></manifest>