2011/06/10

顯示在觸控螢幕做了什麼動作
( http://coderzheaven.com/2011/03/29/using-gestures-in-androida-simple-example )


package pack.GestureSampleThree;
   
    import android.app.Activity;
    import android.graphics.Color;
    import android.os.Bundle;
    import android.view.GestureDetector;
    import android.view.MotionEvent;
    import android.view.GestureDetector.OnGestureListener;
    import android.widget.LinearLayout;
    import android.widget.TextView;
   
    public class GestureSampleThreeExample extends Activity implements OnGestureListener {
         private LinearLayout main;
            private TextView viewA;
   
            private GestureDetector gestureScanner;
   
            @Override
            public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
   
                gestureScanner = new GestureDetector(this);
   
                main = new LinearLayout(this);
                main.setBackgroundColor(Color.GRAY);
                main.setLayoutParams(new LinearLayout.LayoutParams(320,480));
   
                viewA = new TextView(this);
                viewA.setBackgroundColor(Color.YELLOW);
                viewA.setTextColor(Color.BLACK);
                viewA.setTextSize(16);
                viewA.setLayoutParams(new LinearLayout.LayoutParams(320,80));
                main.addView(viewA);
   
                setContentView(main);
            }
   
            @Override
            public boolean onTouchEvent(MotionEvent me) {
                return gestureScanner.onTouchEvent(me);
            }
   
            public boolean onDown(MotionEvent e) {
                viewA.setText("-" + "DOWN" + "-");
                return true;
            }
   
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            viewA.setText("-" + "FLING" + "-");
                return true;
            }
   
            public void onLongPress(MotionEvent e) {
                viewA.setText("-" + "LONG PRESS" + "-");
            }
   
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                viewA.setText("-" + "SCROLL" + "-");
                return true;
            }
   
            public void onShowPress(MotionEvent e) {
                viewA.setText("-" + "SHOW PRESS" + "-");
            }
   
            public boolean onSingleTapUp(MotionEvent e) {
                viewA.setText("-" + "SINGLE TAP UP" + "-");
                return true;
            }
        }


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

計算BMI

Bm.java

package Bm.i;



import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.text.NumberFormat;

public class Bm extends Activity {
    /** Called when the activity is first created. */

    private EditText et1, et2;
    private Button bt1;
    private TextView tv1, tv2, tv3, tv4;
    public static final String MY_PREFS = "mSharedPreferences01";

  
  
 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
      
      
      

        et1 = (EditText)Bm.this.findViewById(R.id.et1);
        et2 = (EditText)Bm.this.findViewById(R.id.et2);
        bt1 = (Button)Bm.this.findViewById(R.id.bt1);
        tv3 = (TextView)Bm.this.findViewById(R.id.tv3);
        tv4 = (TextView)Bm.this.findViewById(R.id.tv4);

     
        bt1.setOnClickListener(new Button.OnClickListener()
        {
     
          public void onClick(View arg0)
          {
              NumberFormat nf = NumberFormat.getInstance();
              nf.setMaximumFractionDigits( 2 );
            
              EditText et1 = (EditText)findViewById(R.id.et1);
              EditText et2 = (EditText)findViewById(R.id.et2);
              double h = Double.parseDouble(et1.getText().toString());
              double w = Double.parseDouble(et2.getText().toString());
              double BMI = w / ((h/100) * (h/100));
              tv3.setText("BMI:"+nf.format(BMI));
              if(BMI<18.5){
                  tv4.setText("體重過輕");
              }
              else if(18.5<=BMI & BMI<24){
                  tv4.setText("體重適中");
              }
              else if(24<=BMI){
                  tv4.setText("體重過重");
              }
             
          }
        });
     

  
      
      
    }
}

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:text="Height"
    android:id="@+id/tv1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    ></TextView>
  
    <EditText
    android:id="@+id/et1"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:inputType="numberDecimal"
    >
        <requestFocus></requestFocus>
    </EditText>
  
  
    <TextView
    android:text="Weight"
    android:id="@+id/tv2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    ></TextView>
  
    <EditText
    android:id="@+id/et2"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:inputType="numberDecimal"
    ></EditText>
  
    <Button
    android:text="Count"
    android:id="@+id/bt1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    ></Button>
  
    <TextView
    android:text=" "
    android:id="@+id/tv3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    ></TextView>
   
    <TextView
    android:text=" "
    android:id="@+id/tv4"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    ></TextView>
  
</LinearLayout>