android - 视频未在视频 View 中播放 - 表面 View

Question

我正在尝试在视频 View 中播放视频，并希望在背景表面 View 中显示来自设备的实时摄像头馈送。但问题是表面 View 覆盖了视频 View ，完全隐藏了它，视频在视频 View 中无法正常播放宁音独奏。谁能帮我解决这个问题？

Activity XML 代码:

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">
<SurfaceView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/surfaceView"/>
    <ProgressBar
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="match_parent"
        android:layout_height="20dp"
        android:background="@drawable/seekbar_video"
        android:id="@+id/progressBar" />

    <ImageButton
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="20dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#00000000"
        android:layout_marginTop="20dp"
        android:src="@drawable/ic_close_3x"
        android:textSize="18dp"
        android:textAllCaps="false"
        android:layout_below="@+id/progressBar"
        android:drawableLeft="@drawable/ic_back_3x"
        android:id="@+id/close"
        />
    <ImageButton
        android:layout_alignParentRight="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#00000000"
        android:layout_marginTop="20dp"
        android:src="@drawable/ic_right_3x"
        android:layout_below="@+id/progressBar"
        android:textSize="18dp"
        android:layout_marginRight="20dp"
        android:textAllCaps="false"
        android:id="@+id/next"
        android:visibility="invisible"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="RECORD"
        android:layout_marginTop="100dp"
        android:textColor="#ffffff"
        android:gravity="center"
        android:layout_centerHorizontal="true"
        android:textSize="25dp"
        />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:background="#ffffff"
        android:gravity="center"
        android:orientation="vertical"
        android:layout_marginTop="140dp"
        android:id="@+id/linearLayout">
        <VideoView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/memix_video"
            />

    </LinearLayout>
    <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#00000000"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="50dp"
        android:id="@+id/camera"
        android:src="@drawable/ic_frontcamera_3x"
        android:layout_marginBottom="40dp"
        />

    <ImageButton
        android:id="@+id/record"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/circle_bg"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="20dp"
        android:src="@drawable/ic_video"
        />
    <ImageButton
        android:id="@+id/record_large"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:background="@drawable/circle_bg"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="20dp"
        android:src="@drawable/ic_video"
        android:visibility="invisible"
        />
    <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#00000000"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_marginRight="50dp"
        android:src="@drawable/ic_undo_3x"
        android:id="@+id/undo"
        android:layout_marginBottom="40dp"
        />
</RelativeLayout>
</FrameLayout>

Java 文件:

import android.Manifest;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.media.MediaRecorder;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.hardware.Camera.Parameters;
import android.media.MediaPlayer;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.widget.VideoView;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class MemixActivity extends AppCompatActivity  implements Callback{
    VideoView videoView;
    private static final int MY_PERMISSIONS_REQUEST_ACCOUNTS = 1;
    File appDir = new File(Environment.getExternalStorageDirectory()+File.separator+"Memecry/temp");
    String filepath=appDir.getAbsolutePath()+"/trim.mp4";

    private SurfaceView mPreview;
    private Camera mCamera;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_memix);
        Log.e("file",filepath);
        videoView=(VideoView)findViewById(R.id.memix_video) ;
        mPreview=(SurfaceView)findViewById(R.id.surfaceView);


        videoView.setVideoPath("/storage/emulated/0/Memecry/temp/trim.mp4");
              videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.setLooping(true);
                mp.start();
                int duration=mp.getDuration();
                Log.e("dur", String.valueOf(duration));
            }
        });
        mPreview = (SurfaceView)findViewById(R.id.surfaceView);


       if( checkAndRequestPermissions()) {
           Log.e("camera","Camera Started");

           mPreview.getHolder().addCallback(this);
           mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

           mCamera = Camera.open();

       }
    }





    private boolean checkAndRequestPermissions() {
        int permissionCAMERA = ContextCompat.checkSelfPermission(this,
                Manifest.permission.CAMERA);


        int storagePermission = ContextCompat.checkSelfPermission(this,


                Manifest.permission.RECORD_AUDIO);



        List<String> listPermissionsNeeded = new ArrayList<>();
        if (storagePermission != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(Manifest.permission.RECORD_AUDIO);
        }
        if (permissionCAMERA != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(Manifest.permission.CAMERA);
        }
        if (!listPermissionsNeeded.isEmpty()) {
            ActivityCompat.requestPermissions(this,


                    listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), MY_PERMISSIONS_REQUEST_ACCOUNTS);
            return false;
        }

        return true;
    }



    @Override    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSIONS_REQUEST_ACCOUNTS:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    //Permission Granted Successfully. Write working code here.
                    mPreview.getHolder().addCallback(this);
                    mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

                    mCamera = Camera.open();



                } else {
                    //You did not accept the request can not use the functionality.
                    checkAndRequestPermissions();
                }
                break;
        }
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        try {
            mCamera.setPreviewDisplay(mPreview.getHolder());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        Camera.Parameters params = mCamera.getParameters();
        List<Camera.Size> sizes = params.getSupportedPreviewSizes();
        Camera.Size selected = sizes.get(0);
        params.setPreviewSize(selected.width,selected.height);
        mCamera.setParameters(params);

        mCamera.startPreview();

    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        Log.i("PREVIEW","surfaceDestroyed");
    }
}

Answer 1

我通过为 videoview 添加 setZOrderOnTop(true) 将其置于最前面来做到这一点，并且它运行良好。