Android?????????????

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????????????????????28????????????????????28????????????д?????????

????1??????????? Lesson37_YYRecorder ????????? MainActivity.java ??

????2?????????????28??????? MainActivity.java ??????????????
????Java????

package basic.android.lesson37;   
  
import java.io.File;   
import java.io.IOException;   
import java.util.Calendar;   
import java.util.Locale;   
  
import android.app.Activity;   
import android.content.Context;   
import android.hardware.Sensor;   
import android.hardware.SensorEvent;   
import android.hardware.SensorEventListener;   
import android.hardware.SensorManager;   
import android.media.MediaRecorder;   
import android.os.Bundle;   
import android.text.format.DateFormat;   
import android.view.View;   
import android.widget.Button;   
import android.widget.TextView;   
import android.widget.Toast;   
  
public class MainActivity extends Activity {   
  
        //?????????   
        private Button recordButton;   
        private Button stopButton;   
  
        //????????????   
        private long initTime = 0;   
        private long lastTime = 0;   
        private long curTime = 0;   
        private long duration = 0;   
  
        private float last_x = 0.0f;   
        private float last_y = 0.0f;   
        private float last_z = 0.0f;   
  
        private float shake = 0.0f;   
        private float totalShake = 0.0f;   
  
        //y???????????   
        private MediaRecorder mr;   
  
        //??????????   
        private boolean isRecoding = false;   
  
        @Override  
        public void onCreate(Bundle savedInstanceState) {   
                super.onCreate(savedInstanceState);   
                setContentView(R.layout.main);   
  
                // UI???   
                recordButton = (Button) this.findViewById(R.id.Button01);   
                stopButton = (Button) this.findViewById(R.id.Button02);   
                final TextView tx1 = (TextView) this.findViewById(R.id.TextView01);   
  
                // ???????????   
                recordButton.setOnClickListener(new View.OnClickListener() {   
  
                        @Override  
                        public void onClick(View v) {   
                                //??????????????????????????????   
                                if(!isRecoding){   
                                        startRecord();   
                                }   
                        }   
                });   
  
                // ???????????   
                stopButton.setOnClickListener(new View.OnClickListener() {   
  
                        @Override  
                        public void onClick(View v) {   
                                initShake();   
                                //???????????????????????   
                                if (mr != null) {   
                                        mr.stop();   
                                        mr.release();   
                                        mr = null;   
                                        recordButton.setText("???");   
                                        Toast.makeText(getApplicationContext()?? "??????"?? Toast.LENGTH_LONG).show();   
                                        isRecoding = false;   
  
                                }   
                        }   
                });   
  
                // ???????????????   
                SensorManager sm = (SensorManager) getSystemService(Context.SENSOR_SERVICE);   
                // ?????????????   
                Sensor acceleromererSensor = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);   
  
                // ???崫?????????????   
                SensorEventListener acceleromererListener = new SensorEventListener() {   
  
                        @Override  
                        public void onAccuracyChanged(Sensor sensor?? int accuracy) {   
                                //???????   
                        }   
  
                        //??????????????   
                        @Override  
                        public void onSensorChanged(SensorEvent event) {           
  
                                //?????п???????????????????????????????????????????????   
                                if(!isRecoding){   
                                        //???????????????????????   
                                        float x = event.values[SensorManager.DATA_X];   
                                        float y = event.values[SensorManager.DATA_Y];   
                                        float z = event.values[SensorManager.DATA_Z];   
  
                                        //???????????????   
                                        curTime = System.currentTimeMillis();   
  
                                        //100?????????   
                                        if ((curTime - lastTime) > 100) {   
  
                                                duration = (curTime - lastTime);   
  
                                                // ???????????ζ?   
                                                if (last_x == 0.0f && last_y == 0.0f && last_z == 0.0f) {   
                                                        //last_x??last_y??last_z???0??????????????   
                                                        initTime = System.currentTimeMillis();   
                                                } else {   
                                                        // ???λζ?????   
                                                        shake = (Math.abs(x - last_x) + Math.abs(y - last_y) + Math.abs(z - last_z)) / duration * 100;   
                                                }   
  
                                                //????ε?ζ????????????????ζ?????   
                                                totalShake += shake;   
  
                                                // ?ж???????????????????д????????????????????????????????????^_^   
                                                if (totalShake > 10 && totalShake / (curTime - initTime) * 1000 > 10) {   
                                                        startRecord();   
                                                        initShake();   
                                                }   
  
                                                tx1.setText("????ζ?????="+totalShake+ " ????ζ?????="+totalShake / (curTime - initTime) * 1000 );   
                                        }   
  
                                        last_x = x;   
                                        last_y = y;   
                                        last_z = z;   
                                        lastTime = curTime;   
                                }   
                        }   
  
                };   
  
                //???????????????????????   
                sm.registerListener(acceleromererListener?? acceleromererSensor?? SensorManager.SENSOR_DELAY_NORMAL);   
  
        }   
  
        // ??????   
        public void startRecord() {   
                //?????????????????   
                isRecoding = true;   
                //??????   
                File file = new File("/sdcard/" + "YY"  
                                + new DateFormat().format("yyyyMMdd_hhmmss"?? Calendar.getInstance(Locale.CHINA)) + ".amr");   
  
                Toast.makeText(getApplicationContext()?? "????????????????" + file.getAbsolutePath()?? Toast.LENGTH_LONG).show();   
  
                // ??????????   
                mr = new MediaRecorder();   
  
                // ??????????????   
                mr.setAudioSource(MediaRecorder.AudioSource.DEFAULT);   
  
                // ??????????   
                mr.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);   
  
                // ?????????   
                mr.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);   
  
                // ??????????   
                mr.setOutputFile(file.getAbsolutePath());   
  
                try {   
                        // ???????   
                        file.createNewFile();   
                        // ??????   
                        mr.prepare();   
                } catch (IllegalStateException e) {   
                        e.printStackTrace();   
                } catch (IOException e) {   
                        e.printStackTrace();   
                }   
                // ??????   
                mr.start();   
                recordButton.setText("?????……");   
        }   
  
        //????????   
        public void initShake() {   
                lastTime = 0;   
                duration = 0;   
                curTime = 0;   
                initTime = 0;   
                last_x = 0.0f;   
                last_y = 0.0f;   
                last_z = 0.0f;   
                shake = 0.0f;   
                totalShake = 0.0f;   
        }   
}  

????4??????С????￡???Android2.2?汾??????????и???????????????????????????????????????????????????????????Щ???? ??????  event.values ??????????????????????Щ???????????з????????????????????????????3????????л????????ж?????????ж????????????????……???? ????????????????????????л????????????????′?????ɡ?