权限 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
activity_main.xml //gisoracle 版权所有
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <EditText android:id="@+id/et_path" android:layout_width="500px" android:layout_height="wrap_content" android:text="/sdcard/a.mp4" /> <Button android:id="@+id/btn_browse" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:text="浏览" /> </LinearLayout> <SeekBar android:id="@+id/seekBar" android:layout_width="match_parent" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/btn_play" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:text="播放" /> <Button android:id="@+id/btn_pause" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:text="暂停" /> <Button android:id="@+id/btn_replay" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:text="重播" /> <Button android:id="@+id/btn_stop" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="1" android:text="停止" /> <TextView android:id="@+id/textView" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="时间:" /> </LinearLayout> <VideoView android:id="@+id/vv_videoview" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout>
java //gisoracle 版权所有
package com.example.yanlei.myapplication; import android.media.MediaMetadataRetriever; import android.media.MediaPlayer; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.content.pm.ActivityInfo; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.provider.MediaStore; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.SeekBar; import android.widget.TextView; import android.widget.Toast; import android.widget.VideoView; import android.app.Activity; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.media.MediaPlayer.OnErrorListener; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.SeekBar; import android.widget.Toast; import android.widget.VideoView; import android.widget.SeekBar.OnSeekBarChangeListener; import java.io.File; import java.util.HashMap; import android.os.Handler; public class MainActivity extends AppCompatActivity { private final String TAG = "main"; private EditText et_path; private Button btn_play, btn_pause, btn_replay, btn_stop, btn_browse; private SeekBar seekBar; private VideoView vv_video; private boolean isPlaying; private TextView pTextView = null; private Handler handler = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); seekBar = (SeekBar) findViewById(R.id.seekBar); et_path = (EditText) findViewById(R.id.et_path); vv_video = (VideoView) findViewById(R.id.vv_videoview); pTextView = (TextView) findViewById(R.id.textView); btn_play = (Button) findViewById(R.id.btn_play); btn_pause = (Button) findViewById(R.id.btn_pause); btn_replay = (Button) findViewById(R.id.btn_replay); btn_stop = (Button) findViewById(R.id.btn_stop); btn_browse = (Button) findViewById(R.id.btn_browse); btn_play.setOnClickListener(click); btn_pause.setOnClickListener(click); btn_replay.setOnClickListener(click); btn_stop.setOnClickListener(click); btn_browse.setOnClickListener(click); // 为进度条添加进度更改事件 seekBar.setOnSeekBarChangeListener(change); //创建属于主线程的handler handler = new Handler(); } private OnSeekBarChangeListener change = new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // 当进度条停止修改的时候触发 // 取得当前进度条的刻度 int progress = seekBar.getProgress(); if (vv_video != null && vv_video.isPlaying()) { // 设置当前播放的位置 vv_video.seekTo(progress); } } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { } }; private View.OnClickListener click = new View.OnClickListener() { @Override public void onClick(View v) { switch (v.getId()) { case R.id.btn_play: play(0); break; case R.id.btn_pause: pause(); break; case R.id.btn_replay: replay(); break; case R.id.btn_stop: stop(); break; case R.id.btn_browse: browse(); break; default: break; } } }; //获得MP4时长 private int getTimeLong(String videoPath) { MediaMetadataRetriever retr = new MediaMetadataRetriever(); retr.setDataSource(videoPath); //String height = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT); // 视频高度 //String width = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH); // 视频宽度 //String rotation = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION); // 视频旋转方向 String timelong = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);//时长，单位为毫秒 retr.release(); int l = Integer.parseInt(timelong); return l; } String myText = ""; protected void play(int msec) { Log.i(TAG, " 获取视频文件地址"); String path = et_path.getText().toString().trim(); File file = new File(path); if (!file.exists()) { Toast.makeText(this, "视频文件路径错误", 0).show(); return; } Log.i(TAG, "指定视频源路径"); vv_video.setVideoPath(file.getAbsolutePath()); Log.i(TAG, "开始播放"); vv_video.start(); // 按照初始位置播放 vv_video.seekTo(msec); // 设置进度条的最大进度为视频流的最大播放时长 final int time = getTimeLong(file.getAbsolutePath()) / 100; seekBar.setMax(time); Toast.makeText(this, "长度:" + time, Toast.LENGTH_LONG).show(); // 开始线程，更新进度条的刻度 new Thread() { @Override public void run() { try { isPlaying = true; while (isPlaying) { // 如果正在播放，0.1.毫秒更新一次进度条 final int current = vv_video.getCurrentPosition() / 100; seekBar.setProgress(current); /* try { myText = "总时间：" + time / 10 + "秒,目前：" + current / 10 + "秒"; // pTextView.setText("总时间：" + time / 10 + "秒,目前：" + current / 10 + "秒"); new WorkThread().start(); } catch (Exception ex) { Log.d("错误:", ex.getMessage().toString()); }*/ new Thread() { public void run() { myText = "总时间：" + time / 10 + "秒,目前：" + current / 10 + "秒"; handler.post(updateUIRunnable); } }.start(); //Toast.makeText(this, "当前:"+current,Toast.LENGTH_LONG).show(); sleep(100); } } catch (Exception e) { e.printStackTrace(); } } }.start(); // 播放之后设置播放按钮不可用 btn_play.setEnabled(false); vv_video.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { // 在播放完毕被回调 btn_play.setEnabled(true); } }); vv_video.setOnErrorListener(new OnErrorListener() { @Override public boolean onError(MediaPlayer mp, int what, int extra) { // 发生错误重新播放 play(0); isPlaying = false; return false; } }); } // 构建Runnable对象，并在runnable中更新UI Runnable updateUIRunnable = new Runnable() { @Override public void run() { try { pTextView.setText(myText); } catch (Exception ex) { Log.e("严重错误:", ex.getMessage().toString()); } } }; /** * 重新开始播放 */ protected void replay() { if (vv_video != null && vv_video.isPlaying()) { vv_video.seekTo(0); Toast.makeText(this, "重新播放", 0).show(); btn_pause.setText("暂停"); return; } isPlaying = false; play(0); } protected void browse() { Intent it = new Intent(Intent.ACTION_GET_CONTENT); //创建动作为 "选取" 的 Intent it.setType("video/*"); //要选取所有视频类型 startActivityForResult(it, 101); } protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == Activity.RESULT_OK) { Uri uri = convertUri(data.getData()); //获取选取文件的 Uri 并进行 Uri 格式转换 et_path.setText(uri.getPath()); //显示文件名 (Uri 最后的节点文字) // txvUri.setText("文件位置：" + uri.getPath());//显示文件的路径 } } Uri convertUri(Uri uri) { //将 "content://" 类型的 Uri 转换为 "file://" 的 Uri if (uri.toString().substring(0, 7).equals("content")) { //如果是以 "content" 开头 String[] colName = {MediaStore.MediaColumns.DATA}; //声明要查询的字段 Cursor cursor = getContentResolver().query(uri, colName, //以 uri 进行查询 null, null, null); cursor.moveToFirst(); //移到查询结果的第一个记录 uri = Uri.parse("file://" + cursor.getString(0)); //将路径转为 Uri cursor.close(); //关闭查询结果 } return uri; //返回 Uri 对象 } /** * 暂停或继续 */ protected void pause() { if (btn_pause.getText().toString().trim().equals("继续")) { btn_pause.setText("暂停"); vv_video.start(); Toast.makeText(this, "继续播放", 0).show(); return; } if (vv_video != null && vv_video.isPlaying()) { vv_video.pause(); btn_pause.setText("继续"); Toast.makeText(this, "暂停播放", 0).show(); } } /* * 停止播放 */ protected void stop() { if (vv_video != null && vv_video.isPlaying()) { vv_video.stopPlayback(); btn_play.setEnabled(true); isPlaying = false; } } }