BitmapUtil.java

package coder.prettygirls.util;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.PixelFormat;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.provider.MediaStore;
import android.util.Log;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import coder.prettygirls.app.MyApplication;

/**
 * bitmap处理工具类
 * Created by oracleen on 2016/7/5.
 */
public class BitmapUtil {

    public static android.graphics.Bitmap drawableToBitmap(Drawable drawable) {
        android.graphics.Bitmap bitmap = android.graphics.Bitmap.createBitmap(

                drawable.getIntrinsicWidth(),

                drawable.getIntrinsicHeight(),

                drawable.getOpacity() != PixelFormat.OPAQUE ? android.graphics.Bitmap.Config.ARGB_8888

                        : android.graphics.Bitmap.Config.RGB_565);

        Canvas canvas = new Canvas(bitmap);

        //canvas.setBitmap(bitmap);

        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());

        drawable.draw(canvas);

        return bitmap;
    }

    public static boolean saveBitmap(Bitmap bitmap, String dir, String name, boolean isShowPhotos) {
        File path = new File(dir);
        if (!path.exists()) {
            path.mkdirs();
        }
        File file = new File(path + "/" + name);
        if (file.exists()) {
            file.delete();
        }
        if (!file.exists()) {
            try {
                file.createNewFile();
            } catch (Exception e) {
                e.printStackTrace();
                return false;
            }
        } else {
            return true;
        }
        FileOutputStream fileOutputStream = null;
        try {
            fileOutputStream = new FileOutputStream(file);
            bitmap.compress(Bitmap.CompressFormat.PNG, 100,
                    fileOutputStream);
            fileOutputStream.flush();

        } catch (Exception e) {
            e.printStackTrace();
            return false;
        } finally {
            try {
                fileOutputStream.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        // 其次把文件插入到系统图库
        if (isShowPhotos) {
            try {
                MediaStore.Images.Media.insertImage(MyApplication.getIntstance().getContentResolver(),
                        file.getAbsolutePath(), name, null);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
            // 最后通知图库更新
            MyApplication.getIntstance().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + file)));
        }

        return true;
    }
}