Android实例-拨打电话
（1）项目结构如下：
（2）MainActivity.java
package com.example.phonecall;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
private Button button;
private EditText editText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) this.findViewById(R.id.button1);
editText = (EditText) this.findViewById(R.id.editText1);
button.setOnClickListener(new ButtonClickListener());
}
private final class ButtonClickListener implements View.OnClickListener {
@Override
public void onClick(View v) {
String number = editText.getText().toString();
Intent intent = new Intent();
/*
* 拨号的话要在清单文件中添加拨号权限
*/
intent.setAction("android.intent.action.CALL");
intent.addCategory("android.intent.category.DEFAULT");
intent.setData(Uri.parse("tel:" + number));
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;
}
}
（3）
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="请输入你的手机号" />
<EditText
android:id="@+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="拨号" />
</LinearLayout>
清单文件中加入权限：
<uses-permission android:name="android.permission.CALL_PHONE" />