Android实现简单拨打电话功能
手机打电话是最常用的功能了,再Android手机开发当中打电话的功能是怎样实现的呢?我来看下简单的拨打电话的代码实例:
步骤一::新建一个Android工程,命名随意.
步骤二:设计布局文件,打开activity_main.xml把内容修改如下:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.wainapp" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="8" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.wainapp.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-permission android:name="android.permission.CALL_PHONE"> </uses-permission> </manifest>
在上面的文件中,开放了拨出电话的权限:
<uses-permission android:name="android.permission.CALL_PHONE"> </uses-permission>
步骤三:写主程序:
package com.example.wainapp; import android.net.Uri; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { private Button bt; private EditText et; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //取得资源 bt = (Button)findViewById(R.id.bt1); et = (EditText)findViewById(R.id.et1); //增加事件响应 bt.setOnClickListener(new Button.OnClickListener(){ @Override public void onClick(View v) { //取得输入的电话号码串 String inputStr = et.getText().toString(); //如果输入不为空创建打电话的Intent if(inputStr.trim().length()!=0){ Intent phoneIntent = new Intent("android.intent.action.CALL", Uri.parse("tel:" + inputStr)); //启动 startActivity(phoneIntent); }else{//否则Toast提示一下 Toast.makeText(MainActivity.this, "不能输入为空", Toast.LENGTH_LONG); } } }); } @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; } }
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