android MediaRecorder录音，flutter加载本地图片批量配置

import java.io.File;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.media.MediaPlayer;

import android.media.MediaPlayer.OnCompletionListener;

import android.media.MediaRecorder;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.Button;

import android.widget.ListView;

import android.widget.SimpleAdapter;

public class MainActivity extends Activity {

private Button btn;

private ListView lv;

private SimpleAdapter adapter;

private MediaRecorder recorder;

private static final String RECORD_DIR = “temp_record”;

// 获得存储在外部的路径

private File dir = new File(Environment.getExternalStorageDirectory(),

RECORD_DIR);

private List<Map<String, String>> records = new ArrayList<Map<String, String>>();

private String currnetPath;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

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

lv = (ListView) findViewById(R.id.recordList);

checkDir();

adapter = new SimpleAdapter(this, records, R.layout.list_cell,

new String[] { “name” }, new int[] { R.id.cell_tv });

refreshAdapter();

lv.setAdapter(adapter);

lv.setOnItemClickListener(new OnItemClickListener() {

@SuppressWarnings(“unchecked”)

@Override

public void onItemClick(AdapterView<?> arg0, View arg1,

int position, long arg3) {

Map<String, String> map = (Map<String, String>) adapter

.getItem(position);

System.out.println(map);

final MediaPlayer mp = MediaPlayer.create(MainActivity.this,

Uri.fromFile(new File(map.get(“path”))));

if(mp==null){

return;

}

mp.start();

mp.setOnCompletionListener(new OnCompletionListener() {

@Override

public void onCompletion(MediaPl

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ayer arg0) {

mp.release();

}

});

}

});

btn.setOnTouchListener(new OnTouchListener() {

@Override

public boolean onTouch(View v, MotionEvent event) {

switch (event.getAction()) {

case MotionEvent.ACTION_DOWN:

recorder = new MediaRecorder();

// 这边这几个方法调用的顺序不能错

recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

// 获得当前存放文件的地址

currnetPath = getPath();

recorder.setOutputFile(currnetPath);

try {

recorder.prepare();

} catch (IllegalStateException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

recorder.start();

break;

case MotionEvent.ACTION_UP:

if (recorder != null) {

try {

recorder.stop();

refreshAdapter();

} catch (RuntimeException stopException) {

// 这个异常出现在录制之后马上停止了

stopException.printStackTrace();

File file = new File(currnetPath);

if (file.exists()) {

// 抛出异常的话就删掉错误的文件

file.delete();

}

}finally{

recorder.release();

recorder = null;

}

标签：MediaRecorder,java,recorder,private,new,import,android,flutter
来源： https://blog.csdn.net/m0_64383081/article/details/121898838