[互联网]Android_课件.ppt

音频采集 录音 创建MediaRecorder对象rec (来自android.media包) 开始录音:创建File对象,扩展名为amr, rec.setOutputFile(f.getAbsoulutePath()) rec.setAudioSource(MediaRecorder.AudioSource.MIC)//设置声源 rec.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT)//输出格式 rec.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT)//音频格式 rec.prepare() rec.start() 结束录音: rec.stop() rec.release() rec=null 权限: android.permission.RECORD_AUDIO public class MyPhoneStateListener extends PhoneStateListener{ public void onCallStateChanged(int state, String incomingNumber) { switch(state){ case TelephonyManager.CALL_STATE_IDLE://待机状态 case TelephonyManager.CALL_STATE_OFFHOOK://通话中 case TelephonyManager.CALL_STATE_RINGING://来电状态 } super.onCallStateChanged(state, incomingNumber); } } 发送短信 基本步骤 利用PhoneNumberUtils.isGlobalPhoneNumber判断一个字符串是不是合法的电话号码 包装一个PendingIntent,当短信发送后会广播出去,这样可以得到短信发送结果 调用SmsManager.getDefault(),获得SmsManager对象 调用SmsManager的sendTextMessage方法,参数:号码,短信内容,PendingIntent 权限 android.permission.SEND_SMS //代码片段1：注册SendInfoRecevier SendInfoReceiver sendInfoReceiver = new SendInfoReceiver(); IntentFilter filter = new IntentFilter(SMS_SEND_ACTION); registerReceiver(sendInfoReceiver,filter); //代码片段2： 发送短信 if (PhoneNumberUtils.isGlobalPhoneNumber(phoneNumber)){ Intent intent = new Intent(SMS_SEND_ACTION); PendingIntent pi = PendingIntent.getBroadcast(SMSActivity.this, 0, intent, 0); SmsManager sm = SmsManager.getDefault(); sm.sendTextMessage(phoneNumber, null , sms, pi, null); } public class SendInfoReceiver extends BroadcastReceiver{ public void onReceive(Context ctx , Intent intent){ int code = this.getResultCode(); if (code == Activity.RESULT_OK){ Toast.makeText(SMSActivity.this, 短信发送成功, 3000).show(); } else if (code == SmsManager.RESULT_ERROR_GENERIC_FAILURE){ Toast.makeText(SMSActivity.this, 短信发送失败, 3000).show(); } else { Toast.makeText(SMSActivity.this, 未知, 3000).show(); } } } 接收短信 基本步骤 定义一个BroadcastReceiver,在配置