Android 之路73---视频播放

其他 2018-05-31 10:19:22 阅读次数: 0

导读

1.用Intent方式实现播放
2.用VideoView实现播放
3.用MediaPlayer实现播放

⚠️三个案例放在了一个工程中

这里写图片描述

这里写图片描述

这里写图片描述

这里写图片描述

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.hala.videoplayer">

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".VideoViewActivity" />
        <activity android:name=".MediaPlayerActivity"></activity>
    </application>

</manifest>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/id_listview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.hala.videoplayer.MainActivity">

</ListView>

item_main.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/id_tv_title"
    android:layout_width="match_parent"
    android:layout_height="56dp"
    android:gravity="center_vertical"
    android:orientation="vertical"
    android:textSize="22dp">

</TextView>

MainActivity.java

package com.hala.videoplayer;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

import java.io.File;
import java.util.Arrays;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private ListView mListView;
    private List<String> mDatas = Arrays.asList("Use Intent",
            "Use VideoView", "Use MediaPlayer & SurfaceView");

    private static final int REQ_CODE_STORAGE = 0x110;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mListView = (ListView) findViewById(R.id.id_listview);
        mListView.setAdapter(
                new ArrayAdapter<String>(this, R.layout.item_main,
                        R.id.id_tv_title, mDatas));

        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                switch (position) {
                    case 0:
                        checkPermissionAndPlayVideo();
                        break;
                    case 1:
                        VideoViewActivity.start(MainActivity.this);
                        break;
                    case 2:
                        MediaPlayerActivity.start(MainActivity.this);
                        break;
                    default:
                        break;
                }
            }
        });
    }



    private void checkPermissionAndPlayVideo() {
        // Here, thisActivity is the current activity
        if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.READ_EXTERNAL_STORAGE)
                != PackageManager.PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
                    REQ_CODE_STORAGE);

        } else {
            playVideoUseIntent();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        switch (requestCode) {
            case REQ_CODE_STORAGE: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    playVideoUseIntent();

                } else {
                    Toast.makeText(this, "该功能需要SDCard权限", Toast.LENGTH_SHORT).show();
                }
                return;
            }

            // other 'case' lines to check for other
            // permissions this app might request
        }
    }

    private void playVideoUseIntent() {
        File file = new File(Environment.getExternalStorageDirectory().getPath(), "ww.mp4");
        Intent intent = new Intent(Intent.ACTION_VIEW);

        if (Build.VERSION.SDK_INT >= 24) {
            Uri contentUri = FileProvider.getUriForFile(this, "com.imooc.videotest.fileprovider", file);
            intent.setDataAndType(contentUri, "video/*");

            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

        } else {
            intent.setDataAndType(Uri.fromFile(file), "video/*");
        }

        startActivity(intent);
    }
}

activity_video_view.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_video_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.hala.videoplayer.VideoViewActivity">

    <VideoView
        android:id="@+id/id_videoview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</RelativeLayout>

VideoViewActivity.java

package com.hala.videoplayer;

import android.content.Context;
import android.content.Intent;

import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;

import java.io.File;

public class VideoViewActivity extends AppCompatActivity {


    private VideoView mVideoView;
    private MediaController mMediaController;


    private static final String KEY_CUR_POS = "key_cur_pos";
    private static final String KEY_IS_PAUSE = "key_is_pause";

    private int mCurrentPos;
    private boolean mIsPause;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video_view);

        mVideoView = (VideoView) findViewById(R.id.id_videoview);

        File file = new File(Environment.getExternalStorageDirectory().getPath(), "lalala.mp4");
        mVideoView.setVideoPath(file.getAbsolutePath());
        mMediaController = new MediaController(this);
        mVideoView.setMediaController(mMediaController);

    }

    @Override
    protected void onResume() {
        super.onResume();

        mVideoView.seekTo(mCurrentPos);

        if (!mIsPause) {
            mVideoView.start();
        }

    }

    @Override
    protected void onPause() {
        super.onPause();
        mCurrentPos = mVideoView.getCurrentPosition();
        mIsPause = !mVideoView.isPlaying();
    }


    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        outState.putInt(KEY_CUR_POS, mCurrentPos);
        outState.putBoolean(KEY_IS_PAUSE, mIsPause);

    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);

        mCurrentPos = savedInstanceState.getInt(KEY_CUR_POS);
        mIsPause = savedInstanceState.getBoolean(KEY_IS_PAUSE);

    }

    public static void start(Context context) {
        Intent intent = new Intent(context, VideoViewActivity.class);
        context.startActivity(intent);
    }
}

activity_media_player.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_media_player"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.hala.videoplayer.MediaPlayerActivity">

    <RelativeLayout
        android:id="@+id/id_rl_container"
        android:layout_width="match_parent"
        android:layout_height="200dp">

        <SurfaceView
            android:id="@+id/id_surface_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <SeekBar
            android:id="@+id/id_seekbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_marginBottom="4dp"/>

        <Button
            android:layout_width="wrap_content"
            android:id="@+id/id_btn_play"
            android:enabled="false"
            android:text="暂停"
            android:layout_alignParentRight="true"
            android:layout_alignParentTop="true"
            android:minHeight="0dp"
            android:minWidth="0dp"
            android:layout_height="wrap_content" />



    </RelativeLayout>

</RelativeLayout>

MediaPlayerActivity.java

package com.hala.videoplayer;

import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.media.MediaPlayer;
import android.os.Environment;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.SeekBar;

import java.io.File;
import java.io.IOException;

public class MediaPlayerActivity extends AppCompatActivity {

    private RelativeLayout mRlContainer;
    private SurfaceView mSurfaceView;
    private SeekBar mSeekBar;
    private Button mBtnPlay;
    private MediaPlayer mMediaPlayer;

    private boolean mIsPrepared;

    private boolean mIsPause;

    private float mRatioHW;

    private Handler mHandler = new Handler();
    private Runnable mUpdateProgressRunnable = new Runnable() {
        @Override
        public void run() {
            if (mMediaPlayer == null) {
                return;
            }
            int currentPosition = mMediaPlayer.getCurrentPosition();
            int duration = mMediaPlayer.getDuration();

            if (mSeekBar != null && duration > 0) {

                int progress = (int) (currentPosition * 1.0f / duration * 1000);
                mSeekBar.setProgress(progress);

                if (mMediaPlayer.isPlaying()) {
                    mHandler.postDelayed(mUpdateProgressRunnable, 1000);
                }

            }

        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_media_player);

        initViews();

        initMediaPlayer();

        initEvents();

    }

    private void initEvents() {

        mSurfaceView.getHolder().addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                mMediaPlayer.setDisplay(holder);

                if (!mIsPrepared) {
                    return;
                }

                if (mIsPause) {
                    mMediaPlayer.seekTo(mMediaPlayer.getCurrentPosition());
                    return;
                }

                if (!mMediaPlayer.isPlaying()) {
                    mMediaPlayer.start();
                    mHandler.post(mUpdateProgressRunnable);
                    mBtnPlay.setText("暂停");
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {

            }
        });

        mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                mHandler.removeCallbacks(mUpdateProgressRunnable);
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                long duration = mMediaPlayer.getDuration();
                int targetPos = (int) (seekBar.getProgress() * 1.0f / 1000 * duration);
                mMediaPlayer.seekTo(targetPos);

                if (mMediaPlayer.isPlaying()) {
                    mHandler.post(mUpdateProgressRunnable);
                }

            }
        });

        mBtnPlay.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mMediaPlayer.isPlaying()) {
                    mMediaPlayer.pause();
                    mBtnPlay.setText("播放");
                    mHandler.removeCallbacks(mUpdateProgressRunnable);
                    mIsPause = true;
                } else {
                    mMediaPlayer.start();
                    mBtnPlay.setText("暂停");
                    mHandler.post(mUpdateProgressRunnable);
                    mIsPause = false;
                }
            }
        });

    }

    private void initMediaPlayer() {

        mMediaPlayer = new MediaPlayer();
        File file = new File(Environment.getExternalStorageDirectory().getPath(), "lalala.mp4");
        try {
            mMediaPlayer.setDataSource(file.getAbsolutePath());
            mMediaPlayer.prepareAsync();
            mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                @Override
                public void onPrepared(MediaPlayer mp) {
                    mIsPrepared = true;
                    mBtnPlay.setEnabled(true);
                    if (!mMediaPlayer.isPlaying()) {
                        mMediaPlayer.start();
                        mBtnPlay.setText("暂停");
                        mHandler.post(mUpdateProgressRunnable);
                    }

                }
            });
            mMediaPlayer.setOnVideoSizeChangedListener(new MediaPlayer.OnVideoSizeChangedListener() {
                @Override
                public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
                    ViewGroup.LayoutParams lp = mRlContainer.getLayoutParams();
                    mRatioHW = height * 1.0f / width;
                    lp.height = (int) (mRlContainer.getWidth() * 1.0f / width * height);
                    mRlContainer.setLayoutParams(lp);
                }
            });
            mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    mHandler.removeCallbacks(mUpdateProgressRunnable);
                    mSeekBar.setProgress(1000);
                    mBtnPlay.setText("播放");
                    mIsPause = true;
                }
            });

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    @Override
    protected void onPause() {
        super.onPause();
        mMediaPlayer.pause();
        mHandler.removeCallbacks(mUpdateProgressRunnable);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMediaPlayer.release();
    }

    @Override
    protected void onResume() {
        super.onResume();
    }

    private void initViews() {
        mRlContainer = (RelativeLayout) findViewById(R.id.id_rl_container);
        mSurfaceView = (SurfaceView) findViewById(R.id.id_surface_view);
        mSeekBar = (SeekBar) findViewById(R.id.id_seekbar);
        mBtnPlay = (Button) findViewById(R.id.id_btn_play);
        mSeekBar.setMax(1000);
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);

        ViewTreeObserver observer = mRlContainer.getViewTreeObserver();
        observer.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                mRlContainer.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                ViewGroup.LayoutParams lp = mRlContainer.getLayoutParams();
                lp.height = (int) (mRatioHW * mRlContainer.getWidth());
                mRlContainer.setLayoutParams(lp);
            }
        });

    }

    public static void start(Context context) {
        Intent intent = new Intent(context, MediaPlayerActivity.class);
        context.startActivity(intent);
    }
}

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