在android中组合图像 [英] Combine Images in android

问题描述

如何通过java编程在android中合并两个图像并保存在外部SD卡或其他地方。

how to merge two images in android by programming in java and save in external SD Card or some where else.

推荐答案

试试这段代码。

private static final String TAG = "JoinImage";
private Bitmap mBackImage, mTopImage, mBackground; 
private BitmapDrawable mBitmapDrawable;
private static String mTempDir;
private String mSavedImageName = null; 
private FileOutputStream mFileOutputStream = null;
private Canvas mCanvas;

in onCreate（）

//Create folder in SDCard to store newly generated image
mTempDir = Environment.getExternalStorageDirectory() + "/TestTemp/";
File mTempFile = new File(mTempDir);
if(!mTempFile.exists()) {
    mTempFile.mkdirs();
}
//File name 
mSavedImageName = "Test.png";
//Width = 604, Height = 1024 Change as per your requirement
mBackground = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
//Put back and top images in your res folder
mBackImage = BitmapFactory.decodeResource(getResources(), R.drawable.launcher);
mTopImage = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);

mCanvas = new Canvas(mBackground);
mCanvas.drawBitmap(mBackImage, 0f, 0f, null);
mCanvas.drawBitmap(mTopImage, 12f, 12f, null);

try {
    mBitmapDrawable = new BitmapDrawable(mBackground);
    Bitmap mNewSaving = mBitmapDrawable.getBitmap();
    String FtoSave = mTempDir + mSavedImageName;
    File mFile = new File(FtoSave);
    mFileOutputStream = new FileOutputStream(mFile);
    mNewSaving.compress(CompressFormat.PNG, 95, mFileOutputStream);
    mFileOutputStream.flush();
    mFileOutputStream.close();
} catch(FileNotFoundException e) {
    Log.e(TAG, "FileNotFoundExceptionError " + e.toString());
} catch(IOException e) {
    Log.e(TAG, "IOExceptionError " + e.toString());
}
Log.i(TAG, "Image Created");

清单添加此uses-permission < uses-permission android：name =android.permission.WRITE_EXTERNAL_STORAGE/>

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

这篇关于在android中组合图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！