ASIX BELAJAR ILKOM

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="MENU" />

    <Button
        android:id="@+id/menggambar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="DRAWING" />

    <Button
        android:id="@+id/gestures"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="GESTURES" />

</LinearLayout>

• Langkah ke 3 membuat layout dimana layout ini sebagai canvas tempat kita akan menggambar.Tambahkan kode program seperti dibawah ini. Karena layout ini hanya digunakan untuk menggambar jadi di gunakanlah ukuran layout menggukanan fill_parent agar terlihat melebar dan konsisten.

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

package com.example.drawingviatouchandgesture;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;

public class SingleTouchEventView extends View {
 
 private Paint paint = new Paint();
 private Path path = new Path();
 
 public Button btnReset;
 public LayoutParams params;

 public SingleTouchEventView(Context context, AttributeSet attrs) {
  super(context, attrs);

  paint.setAntiAlias(true);
  paint.setStrokeWidth(6f);
  paint.setColor(Color.BLACK);
  paint.setStyle(Paint.Style.STROKE);
  paint.setStrokeJoin(Paint.Join.ROUND);
  
     btnReset = new Button(context);
  btnReset.setText("Clear Screen");

  params = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT);
  btnReset.setLayoutParams(params);
  
  btnReset.setOnClickListener(new View.OnClickListener() {
   
   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    // resets the screen
    path.reset();

    // Calls the onDraw() method
    invalidate();
   }
  });
  
 }

 @Override
 protected void onDraw(Canvas canvas) {
  canvas.drawPath(path, paint);
 }

 @Override
 public boolean onTouchEvent(MotionEvent event) {
  float eventX = event.getX();
  float eventY = event.getY();

  switch (event.getAction()) {
  case MotionEvent.ACTION_DOWN:
   path.moveTo(eventX, eventY);
   return true;
  case MotionEvent.ACTION_MOVE:
   path.lineTo(eventX, eventY);
   break;
  case MotionEvent.ACTION_UP:
   // nothing to do
   break;
  default:
   return false;
  }

  // Schedules a repaint.
  invalidate();
  return true;
 }

}

• Untuk memberikan fungsi pada main menu yang diantaranya terdapat drawing and gesture tambahkan class baru MainMenu.java dan masukan kode seperti dibawah ini

package com.example.drawingviatouchandgesture;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;



public class MainMenu extends Activity implements OnClickListener {
 /** Called when the activity is first created. */
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  SingleTouchEventView st = new SingleTouchEventView(this, null);
  setContentView(st);
  addContentView(st.btnReset, st.params);
  
 }

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

 @Override
 public void onClick(View v) {
  // TODO Auto-generated method stub
  Intent back = new Intent(this, MainActivity.class);
  startActivity(back);
 }
 @Override
 protected void onPause() {
  // TODO Auto-generated method stub
  super.onPause();
  finish();
 }
}

package com.example.drawingviatouchandgesture;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.gesture.Gesture;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;


public class MainActivity extends Activity implements OnClickListener{
 /** Called when the activity is first created. */
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);;
  

  Button Gestures = (Button)findViewById(R.id.gestures);
  Gestures.setOnClickListener(new View.OnClickListener() {
   
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    Intent in = new Intent(getApplicationContext(),GesturesActivity.class);
    startActivity(in);
   }
  }); 
  
  
  Button pindah = (Button)findViewById(R.id.menggambar);
  pindah.setOnClickListener(new View.OnClickListener() 
  {
  
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    Intent i = new Intent(getApplicationContext(),MainMenu.class);
    startActivity(i);
   }
  });
 }

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

 @Override
 public void onClick(View v) {
  // TODO Auto-generated method stub
  
 }

}

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.drawingviatouchandgesture.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>
        <activity 
            android:name="com.example.drawingviatouchandgesture.MainMenu"
            android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
             <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>    
        </activity>
        <activity 
            android:name="com.example.drawingviatouchandgesture.GesturesActivity"
            android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.VIEW" />
             <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>    
        </activity>
    </application>

</manifest>