【Android】AsyncTask

AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() { 

  @Override

  protected void onPostExecute(Void result) {

   Log.d("522", "");

  }

  @Override

  protected void onPreExecute() {

   Log.d("522", "");

  }

  @Override

  protected Void doInBackground(Void... arg0) {

   try {

    Log.d("522", "");

    Thread.sleep(3000);

    Log.d("522", "3秒後ProgressDialog還在就關掉");

    if (mProgressDialog != null) {

     try {

      mProgressDialog.dismiss();

     } catch (Exception e) {

      e.printStackTrace();

     }

    }

   } catch (Exception e) {

    e.printStackTrace();

   }

   return null;

  }

 

};

【Eclipse】The zipalign tool was not found in the sdk

就因為出現這個訊息，更新ADT到23.0.0後

【悲劇二】不能Sign APK

Export Signed Application Pac

搜尋網路解法

開啟Eclipse > Window > android SDK Manager，把Tools勾選全部→Install

更新完後Eclipse重啟

ADT 更新22.6後出現無法Build程式

這篇寫得相當好

http://cms.35g.tw/coding/adt-%E6%9B%B4%E6%96%B022-6%E5%BE%8C%E5%87%BA%E7%8F%BE%E7%84%A1%E6%B3%95build%E7%A8%8B%E5%BC%8F/

重點就是

如果您想要好好的配合這個新方式，在建立好新的專案時必需要先：

1. 先對你建的專案與appcompat_v7做Clean
2. 先Build appcompat_v7再Build自已的專案
3. 如果有Clean你的專案，Build發生問題時必需先重新Clean and Buildappcompat_v7

掌握以上原則，基本上你建立的新專案就可以順利的Build成功。

【Android】客製化有圓角的Button (不用圖片)

=======================CheckableButton.java=======================

package com.tsots.widget;

import android.content.Context;

import android.util.AttributeSet;

import android.widget.Button;

import android.widget.Checkable;

public class CheckableButton extends Button implements Checkable {

private boolean mChecked;

private static final int[] CHECKED_STATE_SET = { android.R.attr.state_checked };

public CheckableButton(Context context) {

  super(context);

}

public CheckableButton(Context context, AttributeSet attrs) {

  super(context, attrs);

}

@Override

public int[] onCreateDrawableState(int extraSpace) {

  final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);

  if (isChecked()) {

   mergeDrawableStates(drawableState, CHECKED_STATE_SET);

  }

  return drawableState;

}

@Override

public boolean isChecked() {

  return mChecked;

}

@Override

public void setChecked(boolean checked) {

  if (mChecked != checked) {

   mChecked = checked;

   refreshDrawableState();

  }

}

@Override

public void toggle() {

  setChecked(!mChecked);

}

}

=======================button_background.xml=======================

<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_pressed="true">

        <shape android:shape="rectangle">

            <corners android:radius="80dip" />

            <solid android:color="@color/background_selected" />

        </shape>

</item>

    <item android:state_checked="true">

        <shape android:shape="rectangle">

            <corners android:radius="80dip" />

            <solid android:color="@color/background_selected" />

        </shape>

    </item>

    <item android:state_focused="true">

        <shape android:shape="rectangle">

            <corners android:radius="80dip" />

            <solid android:color="@color/background_selected" />

        </shape>

</item>

    <item>

        <shape android:shape="rectangle">

            <corners android:radius="80dip" />

            <solid android:color="@color/background_normal" />

        </shape>

</item>

</selector>

=======================colors.xml=======================

<color name="background_normal">#1ec20d</color>                          

<color name="background_selected">#0C635B</color>

<color name="white">#FFFFFF</color>

=======================main_layout.xml=======================

<com.tsots.widget.CheckableButton

            android:id="@+id/service_btn"

            android:layout_width="120dp"

            android:layout_height="30dp"

            android:layout_centerHorizontal="true"

            android:background="@drawable/button_background"

            android:text="登入"

            android:textColor="@color/white"

            android:textSize="24dp"

            />

【Android】建立Class定義共同參數 SharedPreferences

======================================================================================

public class Param

{

public void setSharedPreferences(String columns, String data, Context ctxs)

    {

        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(ctxs);

        SharedPreferences.Editor editor = settings.edit();  

        editor.putString(columns, data);

        editor.commit();

    }

public String getSharedPreferences(String columns, Context ctxs)

    {

       String param="no";

       try{

            SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(ctxs);

            param=sp.getString(columns, param);

       }catch(Exception ex){}

        return param;

    }

}

==============================extends Fragment==============================

Activity mActivity;

@Override

public void onAttach(Activity activity) {

  super.onAttach(activity);

  mActivity = (Activity) activity;

}

@Override

public void onCreate(Bundle savedInstanceState) {

        Param pm = new Param();

        pm.setSharedPreferences("startDay", "20150402", mActivity);

        String startDay = pm.getSharedPreferences("startDay", mActivity);

}

==============================extends Activity==============================

@Override

public void onCreate(Bundle savedInstanceState) {

        Param pm = new Param();

        pm.setSharedPreferences("startDay", "20150402", this);

        String startDay = pm.getSharedPreferences("startDay", this);

}

【Android】TextView onClick

.xml

                 <TextView

                      android:id="@+id/card"

                      android:layout_width="wrap_content"

                      android:layout_height="wrap_content"

                      android:clickable="true"

                      android:onClick="fireButton"

                      android:text="卡卡繳費"

                      android:textSize="24dp"

                      />

.java

public void fireButton(View v){

  switch(id){

     int id = v.getId();

   case R.id.card:   //卡卡繳款

     Log.d("522", "click 卡卡繳款");

     Intent cardIt = new Intent();  

     cardIt.putExtra("header_title", getString(R.string.pay_creditcard));

     cardIt.setClass(this,ooo.class);

     cardIt.putExtras(bundle);

     startActivity(cardIt);

     finish();

     break;

}

}

【Android】電話號碼加密 字串取代replace

String old_phone = "0912345678";

String new_phone = phone_old.replaceFirst(phone_no.substring(5, 8), "***");

System.out.plintln(new_phone);//09123***78