bug修复

app/src/main/java/com/electric/chargingpile/activity/PublishTopicActivity.java

import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.Nullable;
import android.support.v7.app.AlertDialog;
import android.text.Editable;
import android.text.Html;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.publishtopic_back:
                finish();
                showDialogToExit();
//                finish();
                break;
            case R.id.publishtopic_publish:
                if (media == null) {
        super.onPause();
        MobclickAgent.onPause(this);
    }
    private void showDialogToExit(){
        AlertDialog.Builder builder = new AlertDialog.Builder(PublishTopicActivity.this);
        builder.setTitle("提示");
        builder.setMessage("确认取消发布？");
        builder.setCancelable(false);
        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                finish();
            }
        });
        builder.setNegativeButton("取消", null);
        builder.create().show();
    }
    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            showDialogToExit();
            return true;
        }
        return false;
    }
}