第一个app--macconvert--获得的技能点

activity_main.xml --布局

1、layout布局或UI组件的参数设置

android:layout_margin ="10dp"边距设置
android:layout_marginLeft="10dp"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:layout_marginRight="10dp"

android:orientation="horizontal" 方向设置-水平  --比如，如果是设置到linearlayout ，那么linearlayout中的view会 水平（横向） 地依次排列
android:orientation="vertical"  方向设置-纵向

2、UI组件的背景效果

－－－可以这样做（android:background＝“＠drawable/dr_edittext”），通过.xml文件来设置

<EditText
                android:id="@+id/edit_text1"
                android:layout_width="200dp"
                android:layout_height="wrap_content"
                android:layout_margin="10dp"
                android:background="@drawable/dr_edittext"   <-- dr_edittext.xml:shape的各种属性设置 -->
                android:hint="请输入.." />

这里推荐一个好用的工具：

3、Android Button Maker

Android Button Maker是一个在线生成Android应用按钮代码的工具。 
Android的API提供可绘制资源，其中的XML文件定义的几何形状，包括颜色，边框和梯度。 
这些按钮是在shape drawable XML代码基础上产生的相比通常的PNG按钮加载速度更快。 
您可以在设置面板中自定义按钮的属性和获得源代码。

--->  http://angrytools.com/android/button/

 

MainActivity.java--功能实现

package com.app.cceasy.macconvert;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.InputType;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    GridLayout gridLayout;
    String [] strs = new String[]{
            "0","1","2","3",
            "4","5","6","7",
            "8","9","A","B",
            "C","D","E","F"
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridLayout = (GridLayout) findViewById(R.id.gridlt);

        EditText edit_text1 = (EditText) findViewById(R.id.edit_text1);
        EditText edit_text2 = (EditText) findViewById(R.id.edit_text2);
        EditText edit_text3 = (EditText) findViewById(R.id.edit_text3);
        edit_text1.setInputType(InputType.TYPE_NULL); //屏蔽软键盘弹出
        edit_text2.setInputType(InputType.TYPE_NULL); //屏蔽软键盘弹出
        edit_text3.setInputType(InputType.TYPE_NULL); //屏蔽软键盘弹出

        for(int i=0;i<16;i++){
            Button bn = new Button(this);
            bn.setText(strs[i]);
            bn.setId(i);
            bn.setTextSize(20);
            bn.setWidth(180);
            bn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    EditText edit_text1 = (EditText) findViewById(R.id.edit_text1);
                    EditText edit_text2 = (EditText) findViewById(R.id.edit_text2);
                    EditText edit_text3 = (EditText) findViewById(R.id.edit_text3);
                    Button b = (Button) findViewById(v.getId());
                    //判断是否有焦点，将键盘内容追加给已获得焦点的EditText --五星好评
                    if (edit_text1.isFocused()) {
                        edit_text1.append(b.getText());//内容追加
                        edit_text1.setError(null);//清除错误消息框
                    } else if (edit_text2.isFocused()) {
                        edit_text2.append(b.getText());
                        edit_text2.setError(null);
                    } else if (edit_text3.isFocused()) {
                        edit_text3.append(b.getText());
                        edit_text3.setError(null);
                    }
                }
            });


            GridLayout.LayoutParams params = new GridLayout.LayoutParams(GridLayout.spec(i/4),GridLayout.spec(i%4));
            params.setGravity(Gravity.FILL);
            //将键盘体填入网格布局
            gridLayout.addView(bn, params);
        }

    }

    public boolean getResult(View view){

        EditText edit_text1 = (EditText) findViewById(R.id.edit_text1);
        EditText edit_text2 = (EditText) findViewById(R.id.edit_text2);
        EditText edit_text3 = (EditText) findViewById(R.id.edit_text3);
        TextView result = (TextView) findViewById(R.id.textview_macEnd);
        if("".equals(edit_text1.getText().toString())){

            edit_text1.setError("请输入内容");
            return false;
        }else if("".equals(edit_text2.getText().toString())){
            edit_text2.setError("请输入内容");
            return false;
        }else if("".equals(edit_text3.getText().toString())){
            edit_text3.setError("请输入内容");
            return false;
        }

        Long macStart = null;
        Long num1 = null;
        Long num2 = null;
        try{
            macStart = Long.parseLong(edit_text1.getText().toString(),16);
        }catch (Exception e){
            edit_text1.setError("输入有误");
            return false;
        }

        try{
            num1 = Long.parseLong(edit_text2.getText().toString(),10);
        }catch (Exception e){
            edit_text2.setError("输入有误");
            return false;
        }
        try{
            num2 = Long.parseLong(edit_text3.getText().toString(),10);
        }catch (Exception e){
            edit_text3.setError("输入有误");
            return false;
        }

        result.setTextSize(20);
        result.setTextColor(Color.BLACK);
        result.setText("0x" + Long.toHexString(macStart+num1*num2-1));
        //result.setText(edit_text1.getText().toString()+edit_text2.getText().toString()+edit_text3.getText().toString());
        return true;
    }
    public void clearData(View view){
        EditText edit_text1 = (EditText) findViewById(R.id.edit_text1);
        EditText edit_text2 = (EditText) findViewById(R.id.edit_text2);
        EditText edit_text3 = (EditText) findViewById(R.id.edit_text3);
        TextView result = (TextView) findViewById(R.id.textview_macEnd);
        edit_text1.setText("");
        edit_text2.setText("");
        edit_text3.setText("");
        result.setText("");

        edit_text1.setError(null);
        edit_text2.setError(null);
        edit_text3.setError(null);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

 

1、EditText.方法--功能用法

EditText：设置内容
edit_text1.setText("***");
EditText：追加内容
Button b = (Button) findViewById(v.getId());
edit_text1.append(b.getText());//内容追加
------------------------
EditText：屏蔽软键盘弹出

edit_text1.setInputType(InputType.TYPE_NULL); 
-------------------------
EditText：冒出错误输入提示

if("".equals(edit_text1.getText().toString())){

    edit_text1.setError("请输入内容"); //setError（“***”）方法：功能- 建立错误提示-冒出红色感叹号，并会在感叹号的下面弹出一个红色小文本框“请输入内容”
}

   edit_text1.setError(null); //清除此输入框组件的错误提示标志

---------------------------------------

EditText：判断是否有焦点（是否正在被输入/被选取）
edit_text1.isFocused() //返回boolean值

---------------------------------

2、gridLayout:网格布局

Button bn = new Button(this);
.......对bn进行初始化，button的onClickListen初始化
//布局参数---控件处于网格布局的位置(行，列)
GridLayout.LayoutParams params = new GridLayout.LayoutParams(GridLayout.spec(i/4),GridLayout.spec(i%4));
//布局参数---fill           
 params.setGravity(Gravity.FILL);
//将键盘体填入网格布局
gridLayout.addView(bn, params);
gridLayout.addView(控件, 布局参数);

--------------------------------

3、从String对象中 获取各进制的整数

macStart = Long.parseLong(edit_text1.getText().toString(),16);  
num1 = Long.parseLong(edit_text2.getText().toString(),10);
num2 = Long.parseLong(edit_text3.getText().toString(),10);

4、将整数转化为16进制的形式，再转成String对象，并返回此String对象

Long.toHexString(macStart+num1*num2-1)


drawable   -----美化
  (1)资源使用--在java中使用资源
Button bn = new Button(this);
bn.setBackgroundResource(R.drawable.keyboardbutton_shape);
   (2)资源使用--在xml中使用资源
  <Button
                android:id="@+id/cleardata"
                android:layout_width="80dp"
                android:layout_height="40dp"
                android:onClick="clearData"
                android:background="@drawable/button_shape"
                android:textSize="10pt"
                android:textColor="@android:color/black"
                android:text="重置" />
shape---文本框--填充、边框效果


button_shape.xml  输入框不同状态下（有焦点和没焦点）的不同显示效果选择




<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:state_window_focused="false"
        android:drawable="@drawable/contact_edit_edittext_normal" />
    <item
        android:state_focused="true"
        android:drawable="@drawable/contact_edit_edittext_focused" />
</selector>




contact_edit_edittext_normal.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 填充 -->
    <solid android:color="#FFFFFF" />
    <!-- 圆角 -->
    <corners android:radius="3dip"/>
    <!-- 描边 -->
    <stroke
        android:width="1dip"
        android:color="#961" />

    <!-- 大小
    <size
        android:width="50dp"
        android:height="50dp"/><!- 宽度和高度 -->

    <!-- 文字和边框的间隔 -->
    <padding
        android:left="2dp"
        android:top="2dp"
        android:right="2dp"
        android:bottom="2dp"/><!-- 各方向的间隔 -->

    <!-- 渐变
    <gradient
        android:startColor="@android:color/white"
        android:centerColor="@android:color/black"
        android:endColor="@android:color/black"
        android:useLevel="true"
        android:angle="45"
        android:type="radial"
        android:centerX="0"
        android:centerY="0"
        android:gradientRadius="90"/>-->

</shape>










            

            
posted @ 
2015-07-24 10:23 
cuiz_book 
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