1.activity代码
package com.zizhu.phone;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
private EditText numberText = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button button = (Button)this.findViewById(R.id.button);
//只需要加载一次即可
numberText = (EditText)findViewById(R.id.number);
button.setOnClickListener(new ButtonClickListener());
}
/**
* 写成内部类的方式可以提高字节码的加载速度，因为虚拟机查找java字节码文件的时候很耗时间
* @author 紫竹
*
*/
private final class ButtonClickListener implements OnClickListener{
@Override
public void onClick(View v) {
String number = numberText.getText().toString();
// Intent intent = new Intent(Intent.ACTION_CALL);
Intent intent = new Intent();
intent.setAction("android.intent.action.CALL");
intent.setData(Uri.parse("tel:" + number));
startActivity(intent);
}
}
}
2.在manifest配置文件中申请权限：
<uses-permission android:name="android.permission.CALL_PHONE" />
3.编写布局配置文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/number" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/number" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/dail"
android:id="@+id/button" />
</LinearLayout>