android简单的调用者对话器例子

Android提供了知道传入号码并借助android Speech api和电话管理器说出来的功能。

在这里，我们将开发一个基本的android应用程序，当电话处于振铃模式时，它会说出传入号码。

在下一页中，我们将看到此应用程序的完整版本，该版本带有呼叫者姓名，并提供设置选项来更改速度和音高。另外，它提供了在传入号码或呼叫者姓名之前和之后添加文本的选项。

activity_main.xml

我们在这里没有做任何特别的事情。它具有简单的textview。

<RelativeLayout xmlns:androclass="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" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>

活动类

在此活动中，我们编写了代码来了解电话状态，并在TextToSpeech类的帮助下说出了进入的电话号码。

package com.example.callertalker;
import java.util.Locale;
import android.media.AudioManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.Toast;
import android.speech.tts.TextToSpeech;

public class MainActivity extends Activity implements TextToSpeech.OnInitListener {
	private TextToSpeech tts;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		tts = new TextToSpeech(this, this);
		  
        TelephonyManager telephonyManager = (TelephonyManager)getSystemService(
                                                                         Context.TELEPHONY_SERVICE);
        
        PhoneStateListener callStateListener = new PhoneStateListener() {
        public void onCallStateChanged(int state, String incomingNumber){
              if(state==TelephonyManager.CALL_STATE_RINGING){
            	  tts.speak(incomingNumber+" calling", TextToSpeech.QUEUE_FLUSH, null);
                  Toast.makeText(getApplicationContext(), "Phone is Ringing : "+incomingNumber, Toast.LENGTH_LONG).show();
                 }
              if(state==TelephonyManager.CALL_STATE_OFFHOOK){
                    Toast.makeText(getApplicationContext(), "Phone in a call or call picked", Toast.LENGTH_LONG).show();
              }
              if(state==TelephonyManager.CALL_STATE_IDLE){
                    //phone is neither ringing nor in a call
              }
        }
        };
        telephonyManager.listen(callStateListener, PhoneStateListener.LISTEN_CALL_STATE);
	}

	@Override
	public void onInit(int status) {
		if (status == TextToSpeech.SUCCESS) {
			int result = tts.setLanguage(Locale.US);
		    if (result == TextToSpeech.LANG_MISSING_DATA
		            || result == TextToSpeech.LANG_NOT_SUPPORTED) {
		        Log.e("TTS", "This Language is not supported");
		    } else {    	
		    }

		} else {
		    Log.e("TTS", "Initilization Failed!");
		}
	}
	
	@Override
	public void onDestroy() {
	// Don't forget to shutdown tts!
	if (tts != null) {
	    tts.stop();
	    tts.shutdown();
	}
	super.onDestroy();
	}
}

AndroidManifest.xml

你需要在此xml文件中添加READ_PHONE_STATE使用权限。让我们看完整的代码。

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:androclass="http://schemas.android.com/apk/res/android"
    package="com.example.callertalker"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

   <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.callertalker.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>

</manifest>