android bitmap另存本地

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1、权限

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

2、主代码

package com.fpt.bitmap2image;
/***
 *
 * 将bitmap保存到本地目录
 *
 * */
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.UUID;

public class MainActivity extends AppCompatActivity {
    private Bitmap bitmap;

    private static final String SD_PATH = "/sdcard/dskqxt/pic/";//保存地址
    private static final String IN_PATH = "/dskqxt/pic/";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        bitmap= ((BitmapDrawable) getResources().getDrawable(R.mipmap.ic_launcher)).getBitmap();
        saveBitmap(this,bitmap);
    }
    public static String saveBitmap(Context context, Bitmap mBitmap) {
        String savePath;
        File filePic;
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)) {
            savePath = SD_PATH;
        } else {
            savePath = context.getApplicationContext().getFilesDir()
                    .getAbsolutePath()
                    + IN_PATH;
        }
        try {
            filePic = new File(savePath + generateFileName() + ".jpg");//保存的格式为jpg
            if (!filePic.exists()) {
                filePic.getParentFile().mkdirs();
                filePic.createNewFile();
            }
            FileOutputStream fos = new FileOutputStream(filePic);
            mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
            fos.flush();
            fos.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return null;
        }

        return filePic.getAbsolutePath();
    }
    /**
     * 随机生产文件名
     *
     * @return
     */
    private static String generateFileName() {
        return UUID.randomUUID().toString();
    }
}