Android -- make a phone call using Intent--使用意图拨打电话

一、File:

package com.jiangge.phonedeom;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 {EditText editText;Button btnCall;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);editText = (EditText) findViewById(R.id.et_phone);btnCall = (Button) findViewById(R.id.btn_call);btnCall.setOnClickListener(new MyListener());}class MyListener implements OnClickListener{@Overridepublic void onClick(View v) {String number = "tel:" + editText.getText().toString().trim();Intent intent = new Intent();intent.setAction(Intent.ACTION_CALL);intent.setData(Uri.parse(number));startActivity(intent);}}}

注意：简写

    Intent callIntent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + "电话号码"));    startActivity(callIntent);

字符串的 trim()方法

二、File:布局文件

<RelativeLayout 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"    tools:context=".MainActivity" >    <EditText        android:id="@+id/et_phone"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true"        android:ems="10"        android:inputType="phone" />    <Button        android:id="@+id/btn_call"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentRight="true"        android:layout_below="@+id/et_phone"        android:layout_marginRight="34dp"        android:text="Button" /></RelativeLayout>

注：布局文件可以直接拖拽，id一定要改的规范些，好的编码风格。

三、File: AndroidManifest.xml

拨打电话需要权限

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

效果图片：