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android开发之音视频(二)

程序员文章站 2022-09-30 12:45:58
我且把视频开发大致分为视频显示控件和音视频控制控件、弹窗控件 MediaPlayer MediaController Popu 播放器MediaPlayer可以理解为一...

我且把视频开发大致分为视频显示控件和音视频控制控件、弹窗控件

MediaPlayer

MediaController

Popu


播放器MediaPlayer可以理解为一个容器,容纳多种布局,这里布局按照16:9的比例显示画面,摆在博主面前的第一个难题出现了,如何实现小屏和全屏的无缝切换?网上有诸多方案并不能令博主满意,最后在几经尝试以及一位博友提示下想到了一个方案

修改MediaPlayer onMeasure函数,根据不同的模式动态requestLayout 动态调整控件宽高,同时回调函数通知隐藏状态栏和标题栏(不一定是标题栏,所以回调函数自己控制)

Tip:
一定要注意修改manifest文件 android:configChanges="screenSize|keyboardHidden|orientation",这样横竖屏切换不会走生命周期,只会changed回调

下面是伪类代码块

package idea.analyzesystem.ijkplayer.widget;

import android.content.Context;
import android.graphics.Point;
import android.util.AttributeSet;
import android.view.View;
import android.view.WindowManager;
import android.widget.FrameLayout;

import idea.analyzesystem.ijkplayer.interfaces.MediaPlayerListener;

/**
 * Created by idea on 2018/2/11.
 */
public class MediaPlayer extends FrameLayout implements View.OnClickListener{

    private final Point screenPoint;

    public static final int MODE_LANDSCAPE = 0;

    public static final int MODE_PORTRAITSCREEN = 1;

    private int mode = MODE_PORTRAITSCREEN;

    public int getMode() {
        return mode;
    }

    /**
     *  MODE_LANDSCAPE 、MODE_PORTRAITSCREEN
     * @param mode
     */
    public void setMode(int mode) {
        if(this.mode!=mode){
            this.mode = mode;
            switch (getMode()){
                case MODE_LANDSCAPE:
                    if(getScreenChangedListener()!=null){
                        getScreenChangedListener().onLandScape();
                    }
                    requestLayout();
                    break;

                case MODE_PORTRAITSCREEN:
                    if(getScreenChangedListener()!=null){
                        getScreenChangedListener().onPortailScreen();
                    }
                    requestLayout();
                    break;
            }
        }

    }

    public MediaPlayer(Context context) {
        this(context,null,0);
    }

    public MediaPlayer(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public MediaPlayer(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        WindowManager windowManager = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
        screenPoint = new Point();
        windowManager.getDefaultDisplay().getSize(screenPoint);

        setOnClickListener(this);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        switch (getMode()){
            case MODE_LANDSCAPE:
                setMeasuredDimension(screenPoint.y,screenPoint.x);
                break;

            case MODE_PORTRAITSCREEN:

                setMeasuredDimension(screenPoint.x,screenPoint.x/16*9);
                break;
        }
    }


    @Override
    public void onClick(View v) {
    }

    /************************************Listener*********************************/

    private MediaPlayerListener.ScreenChangedListener screenChangedListener;

    public MediaPlayerListener.ScreenChangedListener getScreenChangedListener() {
        return screenChangedListener;
    }

    public void setScreenChangedListener(MediaPlayerListener.ScreenChangedListener screenChangedListener) {
        this.screenChangedListener = screenChangedListener;
    }
}

播放界面伪代码块

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

@Override
public void onLandScape() {
        titleView.setVisibility(View.GONE);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}

@Override
public void onPortailScreen() {
        titleView.setVisibility(View.VISIBLE);
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}

第一个知识点,如何实现小屏、全屏无缝切换