布局文件：

<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:orientation="vertical"><TextView<pre class="html" name="code">

android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/phoneinput" /> <EditText android:id="@+id/number" android:layout_width="fill_parent" android:layout_height="wrap_content" tools:ignore="TextFields" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/phonecall" android:id="@+id/button"/></LinearLayout>

权限：

<uses-permission android:name="android.permission.CALL_PHONE"/>

Java代码：

package com.example.call;import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;public class MainActivity extends Activity {public EditText eText;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);eText=(EditText)this.findViewById(R.id.number);Button btn=(Button)this.findViewById(R.id.button);btn.setOnClickListener(new ButtonListener());}private final class ButtonListener implements View.OnClickListener{public void onClick(View v){String mobile=eText.getText().toString();Intent intent=new Intent("android.intent.action.CALL",Uri.parse("tel:"+mobile));startActivity(intent);}}
}