Android保存视图到jpg或png _Android

智慧并不产生于学历,而是来自对于知识的终生不懈的追求。这篇文章主要讲述Android保存视图到jpg或png相关的知识，希望能为你提供帮助。
我想写一个android应用程序，基本上在另一个图像上的图像上叠加，然后我想保存图片与叠加作为jpg或png。基本上这将是我想要保存的整个视图。
示例代码非常有用。
编辑：
我尝试了你的建议，并在Starred Line获得一个空指针。

import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import android.os.Bundle; import android.os.Environment; import android.widget.LinearLayout; import android.widget.TextView; public class EditPhoto extends Activity { /** Called when the activity is first created. */ LinearLayout ll = null; TextView tv = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv = (TextView) findViewById(R.id.text); ll = (LinearLayout) findViewById(R.id.layout); ll.setDrawingCacheEnabled(true); Bitmap b = ll.getDrawingCache(); File sdCard = Environment.getExternalStorageDirectory(); File file = new File(sdCard, "image.jpg"); FileOutputStream fos; try { fos = new FileOutputStream(file); *** b.compress(CompressFormat.JPEG, 95,fos); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); }} }

答案您可以利用View的绘图缓存。

view.setDrawingCacheEnabled(true); Bitmap b = view.getDrawingCache(); b.compress(CompressFormat.JPEG, 95, new FileOutputStream("/some/location/image.jpg"));

视图是您的视图。 95是JPG压缩的质量。而文件输出流就是这样。
另一答案

File sdCard = Environment.getExternalStorageDirectory(); File file = new File(sdCard, "image.jpg"); FileOutputStream fos = new FileOutputStream(file);

在Moncader的答案中使用fos引用作为b.compress（）方法的第3个参数。图像将作为image.jpg存储在SD卡的根目录中。
另一答案【Android保存视图到jpg或png】将RelativeLayout或任何视图保存到图像（.jpg）

String getSaveImageFilePath() { File mediaStorageDir = new File( Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), YOUR_FOLDER_NAME); // Create a storage directory if it does not exist if (!mediaStorageDir.exists()) { if (!mediaStorageDir.mkdirs()) { Log.d(YOUR_FOLDER_NAME, "Failed to create directory"); } }// Create a media file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); String imageName = "IMG_" + timeStamp + ".jpg"; String selectedOutputPath = mediaStorageDir.getPath() + File.separator + imageName; Log.d(YOUR_FOLDER_NAME, "selected camera path " + selectedOutputPath); view.setDrawingCacheEnabled(true); view.buildDrawingCache(); Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache()); int maxSize = 1080; int bWidth = bitmap.getWidth(); int bHeight = bitmap.getHeight(); if (bWidth > bHeight) { int imageHeight = (int) Math.abs(maxSize * ((float)bitmap.getWidth() / (float) bitmap.getHeight())); bitmap = Bitmap.createScaledBitmap(bitmap, maxSize, imageHeight, true); } else { int imageWidth = (int) Math.abs(maxSize * ((float)bitmap.getWidth() / (float) bitmap.getHeight())); bitmap = Bitmap.createScaledBitmap(bitmap, imageWidth, maxSize, true); } view.setDrawingCacheEnabled(false); view.destroyDrawingCache(); OutputStream fOut = null; try { File file = new File(selectedOutputPath); fOut = new FileOutputStream(file); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fOut); fOut.flush(); fOut.close(); } catch (Exception e) { e.printStackTrace(); } return selectedOutputPath; }