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;
	
	@Override
	protected 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{

		@Override
		public 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：