Android屏幕截图并保存截取屏幕的图片到指定文件

ゞ浴缸里的玫瑰 2023-10-17 21:58 22阅读 0赞

**Android屏幕截图并保存截取屏幕的图片到指定文件**

注意要添加权限：

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

完整代码：

package zhangphil.test;
    
    import android.app.Activity;
    import android.content.Context;
    import android.content.res.Resources;
    import android.graphics.Bitmap;
    import android.os.Bundle;
    import android.os.Environment;
    import android.support.annotation.Nullable;
    import android.support.v7.app.AppCompatActivity;
    import android.util.DisplayMetrics;
    import android.view.View;
    import android.widget.Toast;
    
    import java.io.BufferedOutputStream;
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    
    public class JavaActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.drawable_activity);
    
            AppCompatActivity activity = this;
    
            findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "zhangphil.jpg");
                    Bitmap bitmap = screenShot(activity);
                    try {
                        if (!file.exists())
                            file.createNewFile();
    
                        boolean ret = save(bitmap, file, Bitmap.CompressFormat.JPEG, true);
                        if (ret) {
                            Toast.makeText(getApplicationContext(), "截图已保持至 " + file.getAbsolutePath(), Toast.LENGTH_SHORT).show();
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
        }
    
        /**
         * 保存图片到文件File。
         *
         * @param src     源图片
         * @param file    要保存到的文件
         * @param format  格式
         * @param recycle 是否回收
         * @return true 成功 false 失败
         */
        public static boolean save(Bitmap src, File file, Bitmap.CompressFormat format, boolean recycle) {
            if (isEmptyBitmap(src))
                return false;
    
            OutputStream os;
            boolean ret = false;
            try {
                os = new BufferedOutputStream(new FileOutputStream(file));
                ret = src.compress(format, 100, os);
                if (recycle && !src.isRecycled())
                    src.recycle();
            } catch (IOException e) {
                e.printStackTrace();
            }
    
            return ret;
        }
    
    
        /**
         * 获取当前屏幕截图，不包含状态栏（Status Bar）。
         *
         * @param activity activity
         * @return Bitmap
         */
        public static Bitmap screenShot(Activity activity) {
            View view = activity.getWindow().getDecorView();
            view.setDrawingCacheEnabled(true);
            view.buildDrawingCache();
            Bitmap bmp = view.getDrawingCache();
            int statusBarHeight = getStatusBarHeight(activity);
            int width = (int) getDeviceDisplaySize(activity)[0];
            int height = (int) getDeviceDisplaySize(activity)[1];
    
            Bitmap ret = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight);
            view.destroyDrawingCache();
    
            return ret;
        }
    
        public static float[] getDeviceDisplaySize(Context context) {
            Resources resources = context.getResources();
            DisplayMetrics dm = resources.getDisplayMetrics();
            int width = dm.widthPixels;
            int height = dm.heightPixels;
    
            float[] size = new float[2];
            size[0] = width;
            size[1] = height;
    
            return size;
        }
    
        public static int getStatusBarHeight(Context context) {
            int height = 0;
            int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
            if (resourceId > 0) {
                height = context.getResources().getDimensionPixelSize(resourceId);
            }
    
            return height;
        }
    
        /**
         * Bitmap对象是否为空。
         */
        public static boolean isEmptyBitmap(Bitmap src) {
            return src == null || src.getWidth() == 0 || src.getHeight() == 0;
        }
    }