我的Android应用程序挂起我选择图片的那一刻，没有例外，我无法理解为什么，请帮助代码在下面
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;
import android.view.View;
import android.view.View.OnClickListener;
public class SelectPhoto extends Activity implements OnClickListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.photopick_layout);
Button btn=(Button)findViewById(R.id.clickme);
btn.setOnClickListener(this);
}
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, 0);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
TextView textTargetUri = (TextView)findViewById(R.id.targeturi);
if (resultCode == RESULT_OK){
Uri targetUri = data.getData();
textTargetUri.setText(targetUri.toString());
Intent mi = new Intent(this , ImgDisplay.class);
mi.putExtra(getString(R.string.app_name),targetUri);
startActivity(mi);
}
}
}
Imagedisplay活动这是它应该从其uri显示所选图像的部分
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.widget.ImageView;
public class ImgDisplay extends Activity {
private String a;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.image_display);
a =getIntent().getStringExtra(getString(R.string.app_name));
Uri myUri = Uri.parse(a);
ImageView b=(ImageView) findViewById(R.id.image_view);
Bitmap myBitmap = BitmapFactory.decodeFile(a);
b.setImageBitmap(BitmapFactory.decodeFile(a));
b.setImageBitmap(myBitmap);
}
}
照片选择布局这是第一个要求您从gallary中选择图像的布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00AEC5">
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/btn2"
>
<TextView
android:id="@+id/targeturi"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button android:id="@+id/clickme"
android:text="@string/pick"
style="@style/style1"
android:layout_centerInParent="true"
></Button>
</RelativeLayout>
</LinearLayout>
** Image_display layout *这是显示图像的布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00AEC5">
<ImageView android:id="@+id/image_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:maxWidth="42dp"
android:maxHeight="42dp"
android:scaleType="fitCenter"
android:layout_marginLeft="3dp"
></ImageView>
</LinearLayout>
我确信这很容易，但我是新手
答案 0 :(得分：0)
你应该在onActivityResult（例如here）中检查requestCode，如果它属于你的请求，则处理结果，如果不是，则调用super。
答案 1 :(得分：0)
使用
Intent.ACTION_GET_CONTENT
代替。这是我的图像选择器代码完美无缺。
public class GalleryActivity extends Activity {
static Bitmap bmp;
ImageView GalImg;
Uri imageUri;
protected static final int PHOTO_PICKED = 0;
// values for scaling image
protected int outputX = 320;
protected int outputY = 480;
protected int aspectX = 2;
protected boolean scale = true;
protected int aspectY = 3;
Bundle extra;
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.i("gal", "oncreate");
super.onCreate(savedInstanceState);
//setContentView(R.layout.gallery_screen);
extra = getIntent().getExtras();
Intent photoPickerIntent = new Intent(Intent.ACTION_GET_CONTENT);
photoPickerIntent.putExtra("crop", "true");
photoPickerIntent.putExtra("aspectX", aspectX);
photoPickerIntent.putExtra("aspectY", aspectY);
photoPickerIntent.putExtra("outputX", outputX);
photoPickerIntent.putExtra("outputY", outputY);
photoPickerIntent.putExtra("scale", scale);
File photo = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis() + ".jpg");
photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photo));
imageUri = Uri.fromFile(photo);
photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, PHOTO_PICKED);
}
@Override
protected void onActivityResult(int requestCode, int resultcode,
Intent intent) {
super.onActivityResult(requestCode, resultcode, intent);
Log.i("gal", "onActivity");
if (requestCode == 0) {
if (intent != null && resultcode == RESULT_OK) {
Log.i("gal", "if request ok");
//Uri selectedImage = intent.getData();// fetching uri of selected image // image
//Bitmap bMap = (Bitmap) intent.getExtras().get("data");
/*String[] filePathColumn = { MediaStore.Images.Media.DATA };// string data of image // containing
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
cursor.moveToFirst();
// The cursor query returns with the path, but you don't know
// which column it's in until you use the columnIndex code.
// That simply gets the number of the column based on its name,
// the same one used in the filtering process.
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);// file path of image
cursor.close();//Closes the Cursor, releasing all of its resources
bmp = BitmapFactory.decodeFile(filePath);*/
//saving this bitmap into static photo which will have camera pic if camera is called otherwise gallery
//is selected and gallery image gets saved in it
//PlayMenuActivity.photo=bmp;========
//PlayMenuActivity.photo=bMap;
Uri selectedImage = imageUri;
getContentResolver().notifyChange(selectedImage, null);
ContentResolver cr = getContentResolver();
Bitmap bitmap;
try {
bitmap = android.provider.MediaStore.Images.Media.getBitmap(cr, selectedImage);
PlayMenuActivity.photo=bitmap;
Log.i("gal",String.valueOf(bitmap));
Log.i("photo", "data.getAction() is not null. setting image.");
} catch (Exception e) {
//Toast.makeText(this, "Failed to load", Toast.LENGTH_SHORT).show();
Log.i("photo", e.toString());
}
Intent i=new Intent(GalleryActivity.this,ShowActivity.class);
i.putExtra("category","gallery");
startActivity(i);
} else {
Log.i("Status:", "Photopicker canceled");
}
}
}
希望这会有所帮助。
答案 2 :(得分：0)
好的，谢谢大家，我知道它的可耻但唯一的问题是我忘了在清单文件中包含“ImgDisplay”活动:)否则代码工作得很好：D