不错的创意，记一下，

原帖

原理其实就是话筒的监听，需要在AndroidManifest.xml中要加入两个权限

另外模拟器无法测试，只能用真机才有效果

另外：低于API 14的SDK可能无效，我测试小米android2.3.5似乎无效，三星9300 android4.0有效！

以下是copy的代码，留在此处以便将来有不时之需。

package com.li;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class BlowActivity extends Activity {

static TextView text;

Button btn;

Button btn1;

static int i=0;

RecordThread tt=null;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

text=(TextView)findViewById(R.id.text);

btn=(Button)findViewById(R.id.btn);

btn.setOnClickListener(listener);

}

class MyHandler extends Handler{

}

OnClickListener listener=new OnClickListener(){

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

tt=new RecordThread(r); //点击按钮，启动线程

tt.start();

}

};

MyHandler r=new MyHandler(){

@Override

public void handleMessage(Message msg) {

// TODO Auto-generated method stub

super.handleMessage(msg); //接收到message后更新UI，并通过isblow停止线程

text.setText("你吹了一下屏幕"+i);

Parameter.isblow=false;

}

};

}

package com.li;

import android.media.AudioFormat;

import android.media.AudioRecord;

import android.media.MediaRecorder;

import android.os.Bundle;

import android.os.Message;

import com.li.BlowActivity.MyHandler;

public class RecordThread extends Thread {

private AudioRecord ar;

private int bs = 100;

private static int SAMPLE_RATE_IN_HZ = 8000;

private Message msg;

private int number = 1;

private int tal = 1;

private MyHandler handler;

private long currenttime;

private long endtime;

private long time = 1;

// 到达该值之后 触发事件

private static int BLOW_ACTIVI = 3000;

public RecordThread(MyHandler myHandler) {

super();

bs = AudioRecord.getMinBufferSize(SAMPLE_RATE_IN_HZ,

AudioFormat.CHANNEL_CONFIGURATION_MONO,

AudioFormat.ENCODING_PCM_16BIT);

ar = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLE_RATE_IN_HZ,

AudioFormat.CHANNEL_CONFIGURATION_MONO,

AudioFormat.ENCODING_PCM_16BIT, bs);

handler = myHandler;

}

@Override

public void run() {

try {

ar.startRecording();

Parameter.isblow = true;

// 用于读取的 buffer

byte[] buffer = new byte[bs];

while (Parameter.isblow) {

number++;

sleep(8);

currenttime = System.currentTimeMillis();

int r = ar.read(buffer, 0, bs) + 1;

int v = 0;

for (int i = 0; i < buffer.length; i++) {

v += (buffer[i] * buffer[i]);

}

int value = Integer.valueOf(v / (int) r);

tal = tal + value;

endtime = System.currentTimeMillis();

time = time + (endtime - currenttime);

if (time >= 500 || number > 5) {

int total = tal / number;

if (total > BLOW_ACTIVI) {

// 发送消息通知到界面 触发动画

// 利用传入的handler 给界面发送通知

BlowActivity.i += 1;

handler.sendEmptyMessage(0); // 改变i的值后，发送一个空message到主线程

//

number = 1;

tal = 1;

time = 1;

}

}

}

ar.stop();

ar.release();

bs = 100;

} catch (Exception e) {

e.printStackTrace();

}

}

}

public class Parameter {

static boolean isblow;

}

Blow.rar (184.3 KB)

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