我正在尝试做类似于 android 锁屏模式的事情。我有一个类扩展了我创建多个实例的视图。这些同时出现在屏幕上。
我需要能够单独单击它们并将每个单独变为绿色，但是只有一个触摸监听器正在同时收听并且它属于出现的最后一个点，所以如果我单击屏幕上的任何位置最后出现的点无论我点击哪里都会变成绿色。
这是我的点类的代码：
package com.ewebapps;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class Dot extends View implements OnTouchListener {
private final float x;
private final float y;
private final int r;
private final Paint mBlack = new Paint(Paint.ANTI_ALIAS_FLAG);
private final Paint mWhite = new Paint(Paint.ANTI_ALIAS_FLAG);
private final Paint mGreen = new Paint(Paint.ANTI_ALIAS_FLAG);
private boolean touched;
/*
public boolean onInterceptTouchEvent(View v, MotionEvent event) {
touched = true;
//mPaint.setColor(0xFF00FF00); // Turn dot green.
invalidate();
return true;
}
*/
public Dot(Context context, float x, float y, int r) {
super(context);
mBlack.setColor(0xFF000000); //Black
mWhite.setColor(0xFFFFFFFF); //White
mGreen.setColor(0xFF00FF00); //Green
this.x = x;
this.y = y;
this.r = r;
this.setOnTouchListener(new OnTouchListener(){
@Override
public boolean onTouch(View v, MotionEvent event) {
touched = true;
//mPaint.setColor(0xFF00FF00); // Turn dot green.
v.invalidate();
return true;
}
});
}
/* @Override
public boolean dispatchTouchEvent(MotionEvent event) { // On touch.
touched = true;
//mPaint.setColor(0xFF00FF00); // Turn dot green.
this.invalidate();
return super.dispatchTouchEvent(event);
}
*/
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawCircle(x, y, r+2, mWhite); //White stroke.
if(!touched)
{
canvas.drawCircle(x, y, r, mBlack); //Black circle.
}
else
{
canvas.drawCircle(x, y, r, mGreen); //Green circle.
}
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return false;
}
/* @Override
public boolean onTouch(View v, MotionEvent event) {
touched = true;
//mPaint.setColor(0xFF00FF00); // Turn dot green.
invalidate();
return true;
}
*/
}
这是我的主要课程：
package com.ewebapps;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Display;
import android.view.WindowManager;
import android.widget.FrameLayout;
public class dots extends Activity{
public Boolean isRunning, isPaused;
public int maxdots = 20;
public int currentdotdraw = 1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void newdotdraw(){
Display display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int screenwidth = display.getWidth();
int screenheight = display.getHeight();
int x = (int) (Math.random() * screenwidth) + 1;
int y = (int) (Math.random() * screenheight) + 1;
FrameLayout main = (FrameLayout) findViewById(R.id.main_view);
main.addView(new Dot(this,x,y,25));
}
}
在我多次调用 newdotdraw 的代码中。