Android Rookie: 8月 2014

2014年8月15日星期五

实现基于Android的日历系统

http://wenku.baidu.com/view/a9c66920aaea998fcc220e19.html

如何画出一张日历 android

http://www.apkbus.com/android-18453-1-1.html

首先，在主界面自定义一个类Grid01

<view

class="cn.prs.component.Grid01"

android:cacheColorHint="#EFEFEF"

android:layout_width="fill_parent"

android:layout_height="300dip"

android:background="#EFEFEF"

android:id="@+id/view01" />

然后继承View,定义各种参数，

1、public class Grid01 extends View {

* 整个页面的宽高

private int width, height, bound, length;

* 页面显示的年月日

private int month, year, day;

* 定义画笔

public Paint mPaint;

*阳历日期

public String[][] array;

* 1900年1月31日=阴历0年1月1日

public String[][] array1;

public static String[] weeks = { "周一", "周二", "周三", "周四", "周五", "周六", "周日" };

2、初始化画笔

* 使用布局文件时用

public Grid01(Context context, AttributeSet attrs) {

super(context, attrs);

* 初始化画笔

initBrush();

}

private void initBrush() {

// TODO Auto-generated method stub

mPaint = new Paint(); // 初始化画笔

mPaint.setStrokeWidth(0);// 调线条宽

mPaint.setTextSize(16);// 设置字体大小

mPaint.setTextAlign(Paint.Align.CENTER);// 设置文字放置位置

mPaint.setTypeface(Typeface.create("隶书", Typeface.BOLD));

}

3、获取阴阳历数组

private void initArray() {

// TODO Auto-generated method stub

MA ma = new MA (year, month);

array = ma.getArray();

this.setArray(array);

array1 = ma.getArray1();

this.setArray1(array1);

}

4、实现其内部方法

@Override

protected void onSizeChanged(int w, int h, int oldw, int oldh) {

this.width = w;

this.height = h;

super.onSizeChanged(w, h, oldw, oldh);

}

5、画图

@Override

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);

* 要六行，七列

length = width / 7 + 1;// 横长

bound = height / 7 + 1;// 竖长

// 横竖线

for (int i = 0; i < 7; i++) {

// text, x, y, paint

mPaint.setColor(Color.BLACK);// 设置背景

canvas.drawText(weeks, i * length + 25, 20, mPaint);

}

6、画数据，继续

for (int i = 0; i < 6; i++) {

* 画桌布

for (int j = 0; j < 7; j++) {

String text = array[j];

String text1 = array1[j];

* 填充日期数据

canvas.drawText(text, j * length , i * bound + bound

/ 2, mPaint);

canvas.drawText(text1, j * length , i * bound + bound/ 2, mPaint);

* 把画笔颜色重新设为黑色

mPaint.setColor(Color.BLACK);// 设置背景

}

7、使用view.invalidate();刷新数据

效果图如下

2014年8月13日星期三

Converting a Layout view to Image in Android Example

infor from: http://adf.ly/3103720/banner/http://rajeshvijayakumar.blogspot.tw/2013/07/converting-layout-view-to-image-in.html

First Add permission for external storage in Manifest.xml file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.rajeshvijayakumar.view2imagedemo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="org.rajeshvijayakumar.view2imagedemo.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

img_view.xml

home.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="Convert" />

    <include android:id="@+id/f_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        layout="@layout/img_view"
        android:layout_above="@id/button1"/>

</RelativeLayout>

MainActivity.java

package org.rajeshvijayakumar.view2imagedemo;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.MeasureSpec;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener {

    private Button mButton;
    private View mView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.home);
        mView = findViewById(R.id.f_view);
        mButton = (Button) findViewById(R.id.button1);
        mButton.setOnClickListener(this);

        mView.setDrawingCacheEnabled(true);
        mView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
        mView.layout(0, 0, mView.getMeasuredWidth(), mView.getMeasuredHeight());
        mView.buildDrawingCache(true);
    }

    @Override
    public void onClick(View v) {

        if (v.getId() == R.id.button1) {
            Bitmap b = Bitmap.createBitmap(mView.getDrawingCache());
            mView.setDrawingCacheEnabled(false);
            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
            b.compress(Bitmap.CompressFormat.JPEG, 100, bytes);

            File f = new File(Environment.getExternalStorageDirectory() + File.separator + "v2i.jpg");
            try {
                f.createNewFile();
                FileOutputStream fo = new FileOutputStream(f);
                fo.write(bytes.toByteArray());
                fo.close();
            } catch (Exception e) {
            }
            finish();
        }
    }
}

Output :

Source Code : Coming Soon to Github..........

使用include重用UI組件

http://androidbiancheng.blogspot.tw/2011/01/includeui.html

使用include重用UI組件

當我們的佈局有一些重複的UI元素, 我們可以使用<include>來節省我們的工作. 亦可以使用<include>, 在不同的活動(Activity)中使用相同的UI組件.

使用include重用UI組件

當我們的佈局有一些重複的UI元素, 我們可以使用<include>來節省我們的工作. 亦可以使用<include>, 在不同的活動(Activity)中使用相同的UI組件.

先創建重用的UI佈局文檔, sublayout.xml

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

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

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:background="#505050"

    >

<TextView 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="SubLayout"

    />

<Button

 android:id="@+id/mybutton"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text=" A Button "

    />

</LinearLayout>

在我們的主佈局文件包括<include>兩個重用的UI佈局.
main.xml

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

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

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<TextView 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="@string/hello"

    />

<include android:id="@+id/main1" layout="@layout/sublayout" />

<include android:id="@+id/main2" layout="@layout/sublayout" />

<Button

    android:id="@+id/startanotheractivity"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:text=" Start Another Activity "

    />

</LinearLayout>

在程序代碼中, 使用下面的方法來訪問個別元素:
View subLayout1 = (View)findViewById(R.id.main1);
Button myButton_main1 = (Button)subLayout1.findViewById(R.id.mybutton);

AndroidIncludeLayout.java

package com.AndroidIncludeLayout;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;

public class AndroidIncludeLayout extends Activity {

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        View subLayout1 = (View)findViewById(R.id.main1);

        View subLayout2 = (View)findViewById(R.id.main2);

        Button myButton_main1 = (Button)subLayout1.findViewById(R.id.mybutton);

        Button myButton_main2 = (Button)subLayout2.findViewById(R.id.mybutton);

        Button startAnotherActivity = (Button)findViewById(R.id.startanotheractivity);

        startAnotherActivity.setOnClickListener(new Button.OnClickListener(){

   @Override

   public void onClick(View arg0) {

    // TODO Auto-generated method stub

    Intent intent = new Intent();

             intent.setClass(AndroidIncludeLayout.this, AnotherActivity.class);

             startActivity(intent);

   }});

        myButton_main1.setOnClickListener(new Button.OnClickListener(){

   @Override

   public void onClick(View arg0) {

    // TODO Auto-generated method stub

    Toast.makeText(AndroidIncludeLayout.this, "Button 1 Pressed", Toast.LENGTH_LONG).show();

   }});

        myButton_main2.setOnClickListener(new Button.OnClickListener(){

   @Override

   public void onClick(View arg0) {

    // TODO Auto-generated method stub

    Toast.makeText(AndroidIncludeLayout.this, "Button 2 Pressed", Toast.LENGTH_LONG).show();

   }});

    }

}

同樣, 在另一個佈局亦可以重複使用相同的元素.

anotherlayout.xml

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

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

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<TextView 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="The Another Activity"

    />

<include android:id="@+id/main3" layout="@layout/sublayout" />

</LinearLayout>

AnotherActivity.java

package com.AndroidIncludeLayout;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;

public class AnotherActivity extends Activity {

 @Override

 protected void onCreate(Bundle savedInstanceState) {

  // TODO Auto-generated method stub

  super.onCreate(savedInstanceState);

  setContentView(R.layout.anotherlayout);

  View AnotherSubLayout = (View)findViewById(R.id.main3);

  Button myButton_main3 = (Button)AnotherSubLayout.findViewById(R.id.mybutton);

  myButton_main3.setOnClickListener(new Button.OnClickListener(){

   @Override

   public void onClick(View arg0) {

    // TODO Auto-generated method stub

    Toast.makeText(AnotherActivity.this, "Button 3 Pressed", Toast.LENGTH_LONG).show();

   }});

 }

}

記得, 如果你想運行此應用程序, 需要修改AndroidManifest.xml添加AnotherActivity活動(Activity).

訂閱：文章 (Atom)

2014年8月15日 星期五

实现基于Android的日历系统

如何画出一张日历 android

2014年8月13日 星期三

Converting a Layout view to Image in Android Example

img_view.xml

home.xml

MainActivity.java

Output :

使用include重用UI組件

使用include重用UI組件

使用include重用UI組件

2014年8月15日星期五

2014年8月13日星期三