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android - 不能使用 contentResolver

转载 作者:搜寻专家 更新时间:2023-11-01 07:38:04 27 4
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我几乎完成了我的应用程序......但现在我不能像这样使用 ContentResolver:

Bitmap imageBitmap = MediaStore.Images.Media.getBitmap(
getContentResolver(), imageUri); // Problem!!!!!

我不知道如何解决这个问题......如果我在我的主 Activity 中使用这个语法它就可以工作......但它在我的类 CustomItemizedOverlay 中不起作用。

我标记了我必须修复的行......

eclipse 说:方法 getContentResolver () 未定义类型 CustomItemizedOverlay

import java.util.ArrayList;
import android.app.AlertDialog;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.net.Uri;

import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;
import android.app.Dialog;
import android.app.AlertDialog;
import android.widget.TextView;
import android.view.View;
import android.widget.ImageView;
import android.view.LayoutInflater;
import android.widget.Toast;
import android.view.ViewGroup;
import android.provider.MediaStore;
import android.provider.MediaStore.Images;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.app.Application;
import android.content.ContentResolver;
import android.content.Context;




public class CustomItemizedOverlay extends ItemizedOverlay<OverlayItem> {

private ArrayList<OverlayItem> mapOverlays = new ArrayList<OverlayItem>();
private String title;
private String id_string;
private String type;
private String name;
private String adress;
private String webpage;
private String opening_hours;
private Context context;
private Uri imageUri;

public CustomItemizedOverlay(Drawable defaultMarker) {
super(boundCenterBottom(defaultMarker));
}

public CustomItemizedOverlay(Drawable defaultMarker, Context context,String title,String id_string,String type,String name,String adress,String webpage,String opening_hours,Uri imageUri) {
this(defaultMarker);
this.context = context;
this.title = title;
this.id_string = id_string;
this.type = type;
this.name =name;
this.adress = adress;
this.webpage=webpage;
this.opening_hours = opening_hours;
this.imageUri = imageUri;

}

@Override
protected OverlayItem createItem(int i) {
return mapOverlays.get(i);
}

@Override
public int size() {
return mapOverlays.size();
}

@Override
protected boolean onTap(int index) {
OverlayItem item = mapOverlays.get(index);
AlertDialog.Builder dialog = new AlertDialog.Builder(context);

dialog.setTitle(title);
View layout = View.inflate(context, R.layout.dialog, null);

TextView id_text = (TextView)layout.findViewById(R.id.id);
id_text.setText("id:"+id_string);
TextView type_text = (TextView)layout.findViewById(R.id.type);
type_text.setText("type:"+type);
TextView name_text = (TextView)layout.findViewById(R.id.name);
name_text.setText("name:"+name);
TextView adress_text = (TextView)layout.findViewById(R.id.adress);
adress_text.setText("adress:"+adress);
TextView webpage_text = (TextView)layout.findViewById(R.id.webpage);
webpage_text.setText("webpage:"+webpage);
TextView opening_hours_text = (TextView)layout.findViewById(R.id.opening_hours);
opening_hours_text.setText("opening_hours:"+opening_hours);


ContentResolver con = new Contentresolver();

ImageView imageView = (ImageView) layout.findViewById(R.id.photo);
Bitmap imageBitmap = MediaStore.Images.Media.getBitmap(
getContentResolver(), imageUri); // Problem! HERE!!!!
imageView.setImageBitmap(imageBitmap);


dialog.setView(layout);
dialog.show();
return true;
}

public void addOverlay(OverlayItem overlay) {
mapOverlays.add(overlay);
this.populate();
}

最佳答案

getContentResolver 是属于 Context 的子类的方法,例如 Activity。你的类(class)没有这样的方法,所以你不能使用它。最简单的解决方法是在新类中存储对您的 Activity 的引用:

Context context;
public CustomItemizedOverlay(Context myContext, Drawable defaultMarker) {
super(boundCenterBottom(defaultMarker));
context = myContext;
}

然后在需要时调用 context.getContentResolver(...)

关于android - 不能使用 contentResolver,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8017540/

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