利用AS實現手機的播放視頻的功能

使用到的編譯工具 Android studio

其中運用到了VideoView這個控件實現視頻的播放，具體的使用方法如下：

activity_main.xml的佈局如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.administrator.testvideo.MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    <Button
        android:id="@+id/play"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="play" />

    <Button
        android:id="@+id/pause"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Pause"/>

        <Button
            android:id="@+id/replay"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Replay"/>
    </LinearLayout>

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

主佈局的代碼如下：

package com.example.administrator.testvideo;


import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Environment;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.widget.VideoView;

import java.io.File;


public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    private VideoView videoView;

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

        videoView = (VideoView) findViewById(R.id.video_view);
        Button play = (Button) findViewById(R.id.play);
        Button pause = (Button) findViewById(R.id.pause);
        Button replay = (Button) findViewById(R.id.replay);

        play.setOnClickListener(this);
        pause.setOnClickListener(this);
        replay.setOnClickListener(this);

        if(ContextCompat.checkSelfPermission(MainActivity.this,
                Manifest.permission.WRITE_EXTERNAL_STORAGE)!=
                PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(MainActivity.this,
                    new String[]{
                            Manifest.permission.WRITE_EXTERNAL_STORAGE
                    },1);
        }else{
            //初始化MediaPlayer
            initVideoPath();
        }
    }

    private void initVideoPath() {
        File  file = new File(Environment.getExternalStorageDirectory(),"movie.mp4");
        videoView.setVideoPath(file.getPath());//指定視頻文件的路徑
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    switch (requestCode){
        case 1:
            if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                initVideoPath();
            }else {
                Toast.makeText(this,"拒絕權限將無法使用程序",Toast.LENGTH_SHORT).show();
                finish();
            }
            break;
        default:
    }
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            //播放
            case R.id.play:
                if(!videoView.isPlaying()){
                    videoView.start();
                }
                break;
            //暫停播放
            case R.id.pause:
                if(videoView.isPlaying()){
                    videoView.pause();
                }
                break;
            //重新播放
            case R.id.replay:
                if(videoView.isPlaying()){
                    videoView.resume();
                }
                break;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(videoView != null){
            videoView.suspend();
        }
    }
}

注意記得要在Android.Manifest的文件中添加權限

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

最後主要視頻到導入到相應的文件中纔會有圖像顯示出來這裏就不演示了