在我的应用程序中,用户可以从相机意图中获取图像,然后我想将该图像返回到图像视图。我怎么能这样做?
这是我的相机意图:
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivityForResult(intent, TAKE_PICTURE);
onActivityResult
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
//Check that request code matches ours:
if (requestCode == TAKE_PICTURE)
{
//Check if your application folder exists in the external storage, if not create it:
File imageStorageFolder = new File(Environment.getExternalStorageDirectory()+File.separator+"Kruger National Park");
if (!imageStorageFolder.exists())
{
imageStorageFolder.mkdirs();
Log.d(TAG , "Folder created at: "+imageStorageFolder.toString());
}
//Check if data in not null and extract the Bitmap:
if (data != null)
{
String filename = "image";
String fileNameExtension = ".jpg";
File sdCard = Environment.getExternalStorageDirectory();
String imageStorageFolder1 = File.separator+"Kruger National Park"+File.separator;
File destinationFile = new File(sdCard, imageStorageFolder1 + filename + fileNameExtension);
Log.d(TAG, "the destination for image file is: " + destinationFile );
if (data.getExtras() != null)
{
Bitmap bitmap = (Bitmap)data.getExtras().get("data");
try
{
FileOutputStream out = new FileOutputStream(destinationFile);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
}
catch (Exception e)
{
Log.e(TAG, "ERROR:" + e.toString());
}
这一切都有效但只想将它现在添加到我的ImageView中:
ImageView image = (ImageView) v.findViewById(R.id.imageV);
image.setImageResource();
有人可以帮忙吗?
答案 0 :(得分:1)
这是一个示例活动,它将启动相机应用程序,然后检索图像并显示它。
package edu.gvsu.cis.masl.camerademo;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MyCameraActivity extends Activity {
private static final int CAMERA_REQUEST = 1888;
private ImageView imageView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.imageView = (ImageView)this.findViewById(R.id.imageView1);
Button photoButton = (Button) this.findViewById(R.id.button1);
photoButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
}
}
} 请注意,相机应用程序本身使您能够查看/重新拍摄图像,一旦图像被接受,活动就会显示它。
以下是上述活动使用的布局。它只是一个LinearLayout,包含一个带有id button1的Button和一个带有id imageview1的ImageView:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/photo"></Button>
<ImageView android:id="@+id/imageView1" android:layout_height="wrap_content" android:src="@drawable/icon" android:layout_width="wrap_content"></ImageView>
</LinearLayout>
最后一个细节,请务必补充:
<uses-feature android:name="android.hardware.camera"></uses-feature>
如果相机是您的应用功能的可选项。确保在权限中将require设置为false。像这样
<uses-feature android:name="android.hardware.camera" android:required="false"></uses-feature>
到您的manifest.xml。
答案 1 :(得分:0)
你是说这个吗?
image.setImageBitmap(bitmap);
要将位图旋转回原始方向,可以使用以下代码。
ExifInterface exif = new ExifInterface(path);
int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
int angle = 0;
if (orientation == ExifInterface.ORIENTATION_ROTATE_90)
angle = 90;
else if (orientation == ExifInterface.ORIENTATION_ROTATE_180)
angle = 180;
else if (orientation == ExifInterface.ORIENTATION_ROTATE_270)
angle = 270;
Matrix mat = new Matrix();
mat.postRotate(angle);
Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight, mat, true);
这里的字符串'path'是存储图片的文件的路径。这是我目前唯一可以解决该问题的代码。我希望这能帮到您。 在这种情况下可能有趣的是,您还可以为意图提供文件。照片将存储在该文件中。
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(destinationFile));