Design a Greek Key
You choose an feature (such as colour or number of turns or style), then choose the option within it. The Greek Key appears.
app/manifests/AndroidManifest.xml - to force landscape orientation
<![CDATA[
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.edkins.greekkey" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity android:name=".MainActivity" android:screenOrientation="landscape" >
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>]]>
app/res/drawable - pictures
There are a number of files for the different options, colours, numbers and styles.
app/res/mipmap/ic_launcher.png/ - icon for launching app
app/res/values/strings.xml - strings
<![CDATA[
<resources>
<string name="app_name">Design a Greek Key</string>
<string name="keyColourText">Colour</string>
<string name="backgroundText">Background</string>
<string name="turnsText">Turns</string>
<string name="bordersText">Borders</string>
<string name="numberText">Number</string>
<string name="styleText">Style</string>
</resources>
]]>
app/res/layout/activity_main.xml - screen format
<![CDATA[
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<GridView
android:id="@+id/optionGrid"
android:layout_width="640dp"
android:layout_height="wrap_content"
android:paddingBottom="@dimen/activity_vertical_margin"
android:numColumns="10"
android:layout_centerHorizontal="true"
/>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/feature"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:orientation="horizontal"
android:layout_below="@id/optionGrid"
android:layout_centerHorizontal="true"
>
<RadioButton android:id="@+id/keyColour"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/keyColourText"
android:onClick="doKeyColour"
/>
<RadioButton android:id="@+id/background"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/backgroundText"
android:onClick="doBackground"
/>
<RadioButton android:id="@+id/turns"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/turnsText"
android:onClick="doTurns"
/>
<RadioButton android:id="@+id/borders"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/bordersText"
android:onClick="doBorders"
/>
<RadioButton android:id="@+id/numbers"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/numberText"
android:onClick="doNumber"
/>
<RadioButton android:id="@+id/style"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/styleText"
android:onClick="doStyle"
/>
</RadioGroup>
<GridView
android:id="@+id/tileGrid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="@dimen/activity_vertical_margin"
android:layout_below="@id/feature"
/>
</RelativeLayout>
]]>
app/java/com.(the project name)/MainActivity - main code for app
<![CDATA[
package com.edkins.greekkey;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.RadioButton;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
public static int feature=0;
public static int numOpt=10;
public static int keyColour=5;
public static int background=4;
public static int turns=3;
public static int borders=0;
public static int num=4;
public static int style=1;
public static int heightKey;
public static int widthKey;
public static int widthGen;
public static int heightScreen;
public static int widthScreen;
public static int [] [] tile;
public static int [] [] key;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RadioButton acc = (RadioButton) findViewById(R.id.keyColour);
acc.setChecked(true);
feature = 0;
GridView optionV = (GridView) findViewById(R.id.optionGrid);
optionV.setAdapter(new ImageOption(this));
optionV.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
processOptionClick(position);
}
});
setUp();
GridView tileV = (GridView) findViewById(R.id.tileGrid);
tileV.setNumColumns(widthScreen);
tileV.setAdapter(new ImageTile(this));
}
public void processOptionClick(int position) {
if (feature>=2 && feature<= 4 && (position<2 || position>7)) {
Toast.makeText(getApplicationContext(), "Tap on number", Toast.LENGTH_SHORT).show();
return;
}
if (feature==0) {
if (position==background) {background = keyColour;}
keyColour = position;
}
else if (feature==1) {
if (position==keyColour) {keyColour = background;}
background = position;
}
else if (feature==2) {turns = position+1;}
else if (feature==3) {borders = position-2;}
else if (feature==4) {num = position+2; if (style==0) {style = 1;}}
else if (feature==5) {style = position;}
setUp(); redoKey();
}
public void setUp() {
if (style==0 || style==1) {
heightKey = 2 * turns - 1;
widthKey = heightKey + 1;
widthGen = heightKey + 2;
}
else if (style==2) {
heightKey = 2 * turns - 1;
widthKey = 2 * (heightKey - 1);
widthGen = heightKey + 2;
}
else if (style==3 || style==4) {
heightKey = turns + 1;
widthKey = heightKey +1;
widthGen = heightKey + 1;
}
else if (style==5) {
heightKey = turns + 1;
widthKey = 2 * heightKey;
widthGen = heightKey + 1;
}
heightScreen = heightKey + 2 * borders;
widthScreen = widthKey * num;
tile = new int [heightScreen] [widthScreen];
key = new int [heightKey] [widthGen];
for (int y=0; y<heightScreen; y++) {for (int x=0; x<widthScreen; x++) {tile [y] [x]=10;}}
if (style<3) {processKey1();} else {processKey2();}
processStyle();
processBorders();
}
public void processKey1() {
int x; int y;
for (y=0; y<heightKey; y++) {for (x=0; x<widthGen; x++) {key [y] [x]=background;}}
x = widthGen/2; y = heightKey/2;
key[y][x]=keyColour;
x = 0; y = 0; int xi = 1; int yi = 0;
for (int arm = heightKey; arm > 0; arm=arm-2) {
for (int i=0; i<arm; i++) {
key[y][x]=keyColour;
key[heightKey-y-1][widthGen-x-1]=keyColour;
x=x+xi; y=y+yi;
}
x=x-xi; y=y-yi;
int save=yi; yi=xi; xi=-save;
}
}
public void processKey2() {
int x; int y;
for (y=0; y<heightKey; y++) {for (x=0; x<widthGen; x++) {key [y] [x]=background;}}
x = 0; y = 0; int xi = 1; int yi = 0;
for (int arm = heightKey; arm > 1; arm=arm-1) {
for (int i=0; i<arm; i++) {
key[y][x]=keyColour;
x=x+xi; y=y+yi;
}
x=x-xi; y=y-yi;
int save=yi; yi=xi; xi=-save;
}
}
public void processStyle() {
if (style==0 || style==3) {
int i = (num-1)/2; oneKey(i * widthKey);
}
else if (style==1 || style==4) {
for (int x = 0; x < widthScreen; x = x + widthKey) {oneKey(x);}
}
else if (style==2) {
for (int x = 0; x < widthScreen; x = x + widthKey) {flipKey1(x);}
}
else if (style==5) {
for (int x = 0; x < widthScreen; x = x + widthKey) {flipKey2(x);}
}
}
public void oneKey(int startX) {
for (int y=0; y<heightKey; y++) {tile [y + borders] [startX]=keyColour;}
for (int x = 1; x < widthKey; x++) {
for (int y = 0; y < heightKey; y++) {
tile[y + borders][x + startX] = key[y][x];
}
}
}
public void flipKey1(int startX) {
for (int x = 1; x < (widthGen-1); x++) {
for (int y = 0; y < heightKey; y++) {
tile[y + borders][startX + x - 1] = key[y][x];
if ((startX + widthKey - x + 1) < widthScreen) {
tile[y + borders][startX + widthKey - x + 1] = key[y][x];
}
}
}
}
public void flipKey2(int startX) {
for (int y=0; y<heightKey; y++) {key [y] [0]=keyColour;}
for (int x = 0; x < widthGen; x++) {
for (int y = 0; y < heightKey; y++) {
tile[y + borders][startX + x] = key[y][x];
if ((startX + widthKey - x) < widthScreen) {
tile[y + borders][startX + widthKey - x] = key[y][x];
}
}
}
}
public void processBorders() {
int startX = 0; int endX = widthScreen;
if (style==0 || style==3) {
int i = (num-1)/2;
startX = i * widthKey;
endX = startX + widthKey;
}
for (int x = startX; x < endX; x++) {
int colNum = 0;
if (borders%2==1) {colNum=1;}
for (int j=0; j<borders; j++) {
int col=background;
int col2 = background; if (style>2) {col2 = keyColour;}
if (colNum==0) {
col=keyColour;
col2 = keyColour; if (style>2) {col2 = background;}
}
colNum = 1 - colNum;
tile[j][x] = col;
tile[heightScreen-j-1][x]=col2;
}
}
}
public void redoKey() {
GridView tileV = (GridView) findViewById(R.id.tileGrid);
tileV.setNumColumns(widthScreen);
tileV.setAdapter(new ImageTile(this));
}
public void redoOptions() {
GridView optionV = (GridView) findViewById(R.id.optionGrid);
optionV.setNumColumns(numOpt);
optionV.setAdapter(new ImageOption(this));
}
public void doKeyColour(View view) {feature=0; setUp(); numOpt=10; redoOptions();}
public void doBackground(View view) {feature=1; setUp(); numOpt=10; redoOptions();}
public void doTurns(View view) {feature=2; setUp(); numOpt=10; redoOptions();}
public void doBorders(View view) {feature=3; setUp(); numOpt=10; redoOptions();}
public void doNumber(View view) {feature=4; setUp(); numOpt=10; redoOptions();}
public void doStyle(View view) {feature=5; setUp(); numOpt=6; redoOptions();}
public static Integer[] colour = {
R.drawable.colour0, R.drawable.colour1, R.drawable.colour2, R.drawable.colour3,
R.drawable.colour4, R.drawable.colour5, R.drawable.colour6, R.drawable.colour7,
R.drawable.colour8, R.drawable.colour9, R.drawable.colourx
};
public static Integer[] number = {
R.drawable.number0, R.drawable.number1, R.drawable.number2, R.drawable.number3,
R.drawable.number4, R.drawable.number5, R.drawable.number6, R.drawable.number7,
R.drawable.number8, R.drawable.number9, R.drawable.blank
};
public static Integer[] styleName = {
R.drawable.style0, R.drawable.style1, R.drawable.style2,
R.drawable.style3, R.drawable.style4, R.drawable.style5
};
}
]]>
app/java/com.(the project name)/ImageOption - code for option gridview. You create this new file by right-clicking on the MainActvity and select New, then Java class
<![CDATA[
package com.edkins.greekkey;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageOption extends BaseAdapter {
private AppCompatActivity mContext;
public ImageOption(AppCompatActivity c) {mContext = c;}
public int getCount() {return MainActivity.numOpt;}
public Object getItem(int position) {return null;}
public long getItemId(int position) {return 0;}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
imageView = new ImageView(mContext);
GridView opt = (GridView) mContext.findViewById(R.id.optionGrid);
int w = opt.getWidth() / MainActivity.numOpt;
int h = w; if (MainActivity.feature==5) {h=h/2;}
imageView.setLayoutParams(new GridView.LayoutParams(w,h));
}
else {
imageView = (ImageView) convertView;
}
if (MainActivity.feature<2) {
if (position==0) {imageView.setImageResource(MainActivity.colour[10]);}
else{imageView.setImageResource(MainActivity.colour[position]);}
}
else if (MainActivity.feature==2) {
if (position<2 || position>7) {imageView.setImageResource(MainActivity.number[10]);}
else {imageView.setImageResource(MainActivity.number[position+1]);}
}
else if (MainActivity.feature==3) {
if (position<2 || position>7) {imageView.setImageResource(MainActivity.number[10]);}
else {imageView.setImageResource(MainActivity.number[position-2]);}
}
else if (MainActivity.feature==4) {
if (position<2 || position>7) {imageView.setImageResource(MainActivity.number[10]);}
else {imageView.setImageResource(MainActivity.number[position+2]);}
}
else if (MainActivity.feature==5) {imageView.setImageResource(MainActivity.styleName[position]);}
return imageView;
}
}
]]>
app/java/com.(the project name)/ImageTile - code for tile gridview - a new file, see above
<![CDATA[
package com.edkins.greekkey;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageTile extends BaseAdapter {
private AppCompatActivity mContext;
public ImageTile(AppCompatActivity c) {mContext = c;}
public int getCount() {return (MainActivity.widthScreen * MainActivity.heightScreen);}
public Object getItem(int position) {return null;}
public long getItemId(int position) {return 0;}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
imageView = new ImageView(mContext);
GridView opt = (GridView) mContext.findViewById(R.id.tileGrid);
int w = opt.getWidth() / MainActivity.widthScreen;
imageView.setLayoutParams(new GridView.LayoutParams(w, w));
}
else {
imageView = (ImageView) convertView;
}
int x = position % MainActivity.widthScreen;
int y = position / MainActivity.widthScreen;
int i = MainActivity.tile[y][x];
if (i==10) {imageView.setImageResource(MainActivity.number[10]);}
else {imageView.setImageResource(MainActivity.colour[i]);}
return imageView;
}
}
]]>
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© Jo Edkins 2016