Android保存视图到jpg或png

Question

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();
      }

        }
    }

Answer 1

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。

Answer 2

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。

Answer 3

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;
}