ToggleBlockTask.java

package net.dev123.yibo.service.task;

import net.dev123.exception.LibException;
import net.dev123.mblog.MicroBlog;
import net.dev123.mblog.entity.Relationship;
import net.dev123.mblog.entity.User;
import net.dev123.yibo.ProfileActivity;
import net.dev123.yibo.R;
import net.dev123.yibo.YiBoApplication;
import net.dev123.yibo.common.Constants;
import net.dev123.yibo.common.GlobalVars;
import net.dev123.yibo.common.ResourceBook;
import net.dev123.yibo.db.LocalAccount;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.os.AsyncTask;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class ToggleBlockTask extends AsyncTask<Void, Void, Boolean> {
	private static final String TAG   = "ToggleBlockTask";

	private Context context;
    private User targetUser;
    private View view;

	private ProgressDialog dialog = null;
	private String resultMsg = null;;
	public ToggleBlockTask(Context context, User user) {
		this.context = context;
        this.targetUser = user;
	}

	public ToggleBlockTask(View view, User user) {
		this.view = view;
		this.context = view.getContext();
        this.targetUser = user;
	}

	@Override
	protected void onPreExecute() {
		super.onPreExecute();

		if (targetUser.isBlocking()) {
			dialog = ProgressDialog.show(context, null, context.getString(R.string.msg_personal_unblocking));
		} else {
		    dialog = ProgressDialog.show(context, null, context.getString(R.string.msg_personal_blocking));
		}
		dialog.setCancelable(true);
		dialog.setOnCancelListener(onCancelListener);
	}

	@Override
	protected Boolean doInBackground(Void... params) {
        LocalAccount account = ((YiBoApplication)context.getApplicationContext()).getCurrentAccount();
		MicroBlog microBlog = GlobalVars.getMicroBlog(account);

		boolean isSuccess = false;
		if (microBlog == null) {
			return isSuccess;
		}

		try {
			User resultUser = null;
			if (targetUser.isBlocking()) {
				resultUser = microBlog.destroyBlock(targetUser.getId());
				isSuccess = (resultUser.isBlocking() == false);
			} else {
				resultUser = microBlog.createBlock(targetUser.getId());
			    isSuccess = (resultUser.isBlocking() == true);
			}
			if (isSuccess) {
				targetUser.setBlocking(resultUser.isBlocking());
			}
		} catch (LibException e) {
			if (Constants.DEBUG) Log.e(TAG, "Task", e);
			resultMsg = ResourceBook.getStatusCodeValue(e.getExceptionCode(), context);
		}

		return isSuccess;
	}

	@Override
	protected void onPostExecute(Boolean result) {
		super.onPostExecute(result);

		if (dialog != null
				&& dialog.getContext() != null) {
			try {
			    dialog.dismiss();
			} catch (Exception e) {}
		}

		if (result) {
			if (targetUser.isBlocking()) {
				resultMsg = context.getString(R.string.msg_personal_block_success);
			} else {
				resultMsg = context.getString(R.string.msg_personal_unblock_success);
			}
			if (context instanceof ProfileActivity) {
				final ProfileActivity profileActivity = (ProfileActivity)context;
				Relationship relationship = profileActivity.getRelationship();
				if (relationship != null) {
					relationship.setBlocking(targetUser.isBlocking());
					relationship.setFollowing(false); //无论是拉入还是移出黑名单，都不再是following关系
				}
				profileActivity.setRelationship(relationship);
			} else if ( view != null && view instanceof Button) {
				Button btnBlock = (Button)view;
				btnBlock.setEnabled(true);
	        	if (targetUser.isBlocking()) {
	        		btnBlock.setText(R.string.btn_personal_unblock);
	        		btnBlock.setTextColor(R.color.selector_btn_action_negative);
	        		btnBlock.setTextAppearance(context, R.style.btn_action_negative);
	        		btnBlock.setBackgroundResource(R.drawable.selector_btn_action_negative);
	        	} else {
	        		btnBlock.setText(R.string.btn_personal_block);
	        		btnBlock.setTextColor(R.color.selector_btn_action_positive);
	        		btnBlock.setTextAppearance(context, R.style.btn_action_positive);
	        		btnBlock.setBackgroundResource(R.drawable.selector_btn_action_positive);
	        	}
	        	btnBlock.setOnClickListener(new View.OnClickListener() {
					@Override
					public void onClick(View v) {
						new ToggleBlockTask(view, targetUser).execute();
					}
				});
			}
		}

		Toast.makeText(context, resultMsg, Toast.LENGTH_SHORT).show();
	}

	private OnCancelListener onCancelListener = new OnCancelListener() {
		public void onCancel(DialogInterface dialog) {
			cancel(true);
		}
	};
}