android屏幕截屏

package com.fpt.screenplayer.two;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.PixelFormat;
import android.hardware.display.DisplayManager;
import android.hardware.display.VirtualDisplay;
import android.media.Image;
import android.media.ImageReader;
import android.media.projection.MediaProjection;
import android.media.projection.MediaProjectionManager;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.fpt.screenplayer.R;

import java.nio.ByteBuffer;

public class SecondScreenImageActivity extends Activity{
    private Button btn;
    private ImageView imageView;
    private MediaProjection mediaProjection;
    private VirtualDisplay virtualDisplay;
    private MediaProjectionManager projectionManager;
    final static int REQUESTRESULT = 0x100;
    private int mWidth;
    private int mHeight;
    private int mScreenDensity;
    private ImageReader mImageReader;
    private LinearLayout ll;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        initView();
        initData();
    }

    private void initView() {
        btn=findViewById(R.id.main_btn);
        ll=findViewById(R.id.ll);
        imageView=findViewById(R.id.main_img);
    }

    public void initData(){
        projectionManager = (MediaProjectionManager) getSystemService(MEDIA_PROJECTION_SERVICE);
        Display display = getWindowManager().getDefaultDisplay();
        mWidth = display.getWidth();
        mHeight = display.getHeight();
        DisplayMetrics outMetric = new DisplayMetrics();
        display.getMetrics(outMetric);
        mScreenDensity = (int) outMetric.density;
        Intent intent = new Intent(projectionManager.createScreenCaptureIntent());
        startActivityForResult(intent,REQUESTRESULT);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Image image = mImageReader.acquireLatestImage();
                int width = image.getWidth();
                int height = image.getHeight();
                final Image.Plane[] planes = image.getPlanes();
                final ByteBuffer buffer = planes[0].getBuffer();
                int pixelStride = planes[0].getPixelStride();
                int rowStride = planes[0].getRowStride();
                int rowPadding = rowStride - pixelStride * width;
                Bitmap bitmap = Bitmap.createBitmap(width+rowPadding/pixelStride, height,
                        Bitmap.Config.ARGB_8888);
                bitmap.copyPixelsFromBuffer(buffer);
                bitmap = Bitmap.createBitmap(bitmap, 0, 0,width, height);
                image.close();
                imageView.setImageBitmap(bitmap);
                ll.setBackgroundColor(0x0f0);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            mImageReader = ImageReader.newInstance(mWidth,mHeight, PixelFormat.RGBA_8888, 2);
            mediaProjection = projectionManager.getMediaProjection(resultCode,data);
            virtualDisplay = mediaProjection.createVirtualDisplay("mediaprojection",mWidth,mHeight,
                    mScreenDensity, DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,mImageReader.getSurface(),null,null);

        }
    }
}

效果如下：