Android屏幕截图并保存截取屏幕的图片到指定文件

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：
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;    }}
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