我正在尝试创建一个对话框,显示用户手机中的所有应用程序,可用于从存储中选择照片或使用相机拍摄照片。以下是我计划使用的两个意图。
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
我发现使用可以执行上述操作的应用程序在自定义对话框中填充列表视图的最佳方法是使用queryIntentActivityOptions()
方法,但我被困住了。
这是我包含对话框的方法。请我研究过,但还没有找到一个好的教程来指导我如何实施 queryIntentActivityOptions()
private void acquirePicture(){
Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(photoPickerIntent, 1);
final Dialog dialog = new Dialog(this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
WindowManager.LayoutParams WMLP = dialog.getWindow().getAttributes();
WMLP.gravity = Gravity.CENTER;
dialog.getWindow().setAttributes(WMLP);
dialog.getWindow().setBackgroundDrawable(
new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialog.setCanceledOnTouchOutside(true);
dialog.setContentView(R.layout.about_dialog);
dialog.setCancelable(true);
ListView lv=(ListView)dialog.findViewById(R.id.listView1);
PackageManager pm=getPackageManager();
List<ResolveInfo> launchables=pm.queryIntentActivityOptions(
this.getComponentName(),new Intent[]{photoPickerIntent,takePicture},
null,PackageManager.MATCH_DEFAULT_ONLY);
Collections.sort(launchables,
new ResolveInfo.DisplayNameComparator(pm));
appAdapter=new AppAdapter(pm, launchables);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
// TODO Auto-generated method stub
ResolveInfo launchable=appAdapter.getItem(position);
ActivityInfo activity=launchable.activityInfo;
ComponentName name=new ComponentName(activity.applicationInfo.packageName,
activity.name);
//I DON'T KNOW WHAT TO DO NEXT OR WHETHER AM DOING IT
THE CORRECT WAY
}
});
dialog.show();
}
class AppAdapter extends ArrayAdapter<ResolveInfo> {
private PackageManager pm=null;
AppAdapter(PackageManager pm, List<ResolveInfo> apps) {
super(Custom_chooser.this, R.layout.row, apps);
this.pm=pm;
}
@Override
public View getView(int position, View convertView,
ViewGroup parent) {
if (convertView==null) {
convertView=newView(parent);
}
bindView(position, convertView);
return(convertView);
}
private View newView(ViewGroup parent) {
return(getLayoutInflater().inflate(R.layout.row, parent, false));
}
private void bindView(int position, View row) {
TextView label=(TextView)row.findViewById(R.id.label);
label.setText(getItem(position).loadLabel(pm));
ImageView icon=(ImageView)row.findViewById(R.id.icon);
icon.setImageDrawable(getItem(position).loadIcon(pm));
}
}