【移動應(yīng)用開發(fā)技術(shù)】Android中怎么利用imageview將圖片保存到本地

【移動應(yīng)用開發(fā)技術(shù)】Android中怎么利用imageview將圖片保存到本地

Android中怎么利用imageview將圖片保存到本地，針對這個問題，這篇文章詳細(xì)介紹了相對應(yīng)的分析和解答，希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。rxJavapublic

class

SaveImageUtils

{

public

static

void

imageSave(final

ImageView

imageView,

final

int

id)

{

Observable

.create(new

Observable.OnSubscribe<ImageView>()

{

@Override

public

void

call(Subscriber<?

super

ImageView>

sub)

{

sub.onNext(imageView);

}

}

).subscribeOn(Schedulers.io())

.observeOn(AndroidSchedulers.mainThread())

.subscribe(new

MySubscriber<ImageView>()

{

@Override

public

void

onNext(ImageView

imageView)

{

File

imageFile

=

new

File(ActivityUtils.ImagePath(),

id

+

".jpg");

FileOutputStream

outStream

=

null;

try

{

outStream

=

new

FileOutputStream(imageFile);

Bitmap

image

=

imageView.getDrawingCache();

press(Bitmap.CompressFormat.JPEG,

100,

outStream);

outStream.flush();

outStream.close();

Toast.makeText(UIUtils.getContext(),

UIUtils.getString(R.string.save_picture_success),

Toast.LENGTH_LONG).show();

}

catch

(IOException

e)

{

e.printStackTrace();

onError(e);

}

}

@Override

public

void

onError(Throwable

e)

{

Toast.makeText(UIUtils.getContext(),

UIUtils.getString(R.string.save_picture_failed),

Toast.LENGTH_LONG).show();

}

});

}

}MySubscriberpublic

class

MySubscriber<T>

extends

Subscriber<T>

{

@Override

public

void

onStart()

{

super.onStart();

}

@Override

public

void

onCompleted()

{

}

@Override

public

void

onError(Throwable

e)

{

}

@Override

public

void

onNext(T

t)

{

}

}

//不建議使用了

package

com.app.mly.utils;

import

android.app.Activity;

import

android.graphics.Bitmap;

import

android.os.AsyncTask;

import

android.os.Environment;

import

android.widget.ImageView;

import

android.widget.Toast;

import

com.fengche.android.mly.R;

import

java.io.File;

import

java.io.FileOutputStream;

/**

*

Created

by

y

on

2016/1/14.

*/

public

class

SaveImageUtils

extends

AsyncTask<Bitmap,

Void,

String>

{

Activity

mActivity;

ImageView

mImageView;

public

SaveImageUtils(Activity

activity,

ImageView

imageView)

{

this.mImageView

=

imageView;

this.mActivity

=

activity;

}

@Override

protected

String

doInBackground(Bitmap...

params)

{

String

result

=

mActivity.getResources().getString(R.string.save_picture_failed);

try

{

String

sdcard

=

Environment.getExternalStorageDirectory().toString();

File

file

=

new

File(sdcard

+

"/123");

if

(!file.exists())

{

file.mkdirs();

}

File

imageFile

=

new

File(file.getAbsolutePath(),

"命名"

+

".jpg");

FileOutputStream

outStream

=

null;

outStream

=

new

FileOutputStream(imageFile);

Bitmap

image

=

params[0];

press(Bitmap.CompressFormat.JPEG,

100,

outStream);

outStream.flush();

outStream.close();

result

=

mActivity.getResources().getString(R.string.save_picture_success,

file.getAbsolutePath());

}

catch

(Exception

e)

{

e.printStackTrace();

}

return

result;

}

@Override

protected

void

onPostExecute(String

result)

{

Toast.makeText(mActivity,

result,

Toast.LENGTH_SHORT).show();

mImageView.setDrawingCacheEnabled(false);

}

}stirng文件下需要的幾個toast<string

name="save_picture">保存圖片</string>

<string

name="save_picture_failed">保存失敗</string>

<string

name="save_picture_success">圖片成功保存至%s目錄</string>代碼中引用mScanCode.setOnLongClickListener(new

View.OnLongClickListener()

{

@Override

public

boolean

onLongClick(View

v)

{

AlertDialog.Builder

builder

=

new

AlertDialog.Builder(ShareActivity.this);

builder.setItems(new

String[]{getResources().getString(R.string.save_picture)},

new

DialogInterface.OnClickListener()

{

@Override

public

void

onClick(DialogInterface

dialog,

int

which)

{

mScanCode.setDrawingCacheEnabled(true);

Bitmap

imageBitmap

=

mScanCode.getDrawingCache();