3
I tried to search several sources, but I still don’t understand why Toast class DrawView is not displayed when I click on the screen.
Any idea?
public class MyActivity extends Activity{
public static Context context;
public int teste = 0;
DrawView drawView;
public static int width;
public static int height;
public static boolean displayInPortrait;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context = getApplicationContext();
// Para a activity pegar a tela inteira
fullscreen();
// Para saber o tamanho da tela
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
width = size.x;
height = size.y;
Toast.makeText(getApplicationContext(), "Screen size is: " + width + " px (X), and " + height + "px (Y)!", Toast.LENGTH_LONG).show();
if(height > width){
displayInPortrait = true;
Toast.makeText(getApplicationContext(), "Portrait Mode", Toast.LENGTH_SHORT).show();
} else{
displayInPortrait = false;
Toast.makeText(getApplicationContext(), "Landscape Mode", Toast.LENGTH_SHORT).show();
}
// DrawView
drawView = new DrawView(this);
drawView.setBackgroundColor(Color.WHITE);
setContentView(drawView);
}
public void fullscreen(){
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
}
}
Drawview class:
public class DrawView extends View implements View.OnTouchListener{
Context context = MyActivity.context;
Rect banheiro;
Paint paint = new Paint();
int deviceWidth = MyActivity.width;
int deviceHeight = MyActivity.height;
float deviceRatio;
float difAltura;
float difLargura;
float scaledPhotoHeight_1;
float scaledPhotoWidth_1;
float scaledPhotoHeight_2;
float scaledPhotoWidth_2;
boolean deviceOrientation = MyActivity.displayInPortrait;
Bitmap fotoOriginal;
Bitmap fotoScaled;
float myRatio;
float myScaledRatio;
public DrawView(Context context) {
super(context);
paint.setColor(Color.BLACK);
deviceRatio = (float) deviceHeight / deviceWidth;
fotoOriginal = BitmapFactory.decodeResource(getResources(), R.drawable.ilha_de_malaga_transparente);
myRatio = (float)fotoOriginal.getHeight() / fotoOriginal.getWidth();
redimensionar();
fotoScaled = Bitmap.createScaledBitmap(fotoOriginal, (int) scaledPhotoWidth_2, (int) scaledPhotoHeight_2, false);
myScaledRatio = (float) fotoScaled.getHeight() / fotoScaled.getWidth();
banheiro = new Rect(270,300,380,470);
}
@Override
protected void onDraw(Canvas canvas) {
float desenharNoMeioDaTelaWidth = (float) (deviceWidth - scaledPhotoWidth_2)/2;
float desenharNoMeioDaTelaHeight = (float) (deviceHeight - scaledPhotoHeight_2)/2;
canvas.drawBitmap(fotoScaled, desenharNoMeioDaTelaWidth, desenharNoMeioDaTelaHeight, paint);
paint.setColor(Color.RED);
paint.setTextSize(25.0f);
canvas.drawText("Device Height: " + deviceHeight, 0, 25, paint);
canvas.drawText("Device Width: " + deviceWidth, 0, 50, paint);
canvas.drawText("Device Ratio is: " + deviceRatio, 0, 75, paint);
canvas.drawText("Original Photo Height: " + fotoOriginal.getHeight(), 0, 125, paint);
canvas.drawText("Original Photo Width: " + fotoOriginal.getWidth(), 0, 150, paint);
canvas.drawText("Original Photo Ratio is: " + myRatio, 0, 175, paint);
canvas.drawText("Scaled Photo Height: " + fotoScaled.getHeight(), 0, 225, paint);
canvas.drawText("Scaled Photo Width: " + fotoScaled.getWidth(), 0, 250, paint);
canvas.drawText("Scaled Photo Ratio is: " + myScaledRatio, 0, 275, paint);
paint.setColor(Color.argb(100,255,255,0));
canvas.drawRect(banheiro,paint);
}
protected void redimensionar(){
// O redimensionamento da foto é interessante, pois cada tela de celular
// tem uma largura e altura, bem como cada foto. Dependendo das dimensões
// da imagem, redimensionar só um lado (e aplicar a razão largura/altura)
// ao outro já dá certo. As vezes tem que redimensionar duas vezes.
difAltura = fotoOriginal.getHeight() - deviceHeight;
difLargura = fotoOriginal.getWidth() - deviceWidth;
// A largura e altura estão fora da tela.
if(difAltura > 0 && difLargura > 0){
// Começamos a redimensionar pelo lado que está mais fora da tela, e depois
// aplicamos ao outro, se necessário.
if(difAltura > difLargura) {
float ratio = (float) deviceHeight / fotoOriginal.getHeight();
scaledPhotoHeight_1 = ratio * fotoOriginal.getHeight();
scaledPhotoWidth_1 = ratio * fotoOriginal.getWidth();
// Neste ponto a altura da foto foi redimensionado para ser igual a altura da tela,
// e a largura seguiu a proporção. Mas será que a largura ficou dentro da tela também?
float difLargura_2 = scaledPhotoWidth_1 - deviceWidth;
// A altura ficou fora da tela e tem que ser redimensionada
if(difLargura_2 > 0){
float ratio_2 = (float) deviceWidth / scaledPhotoWidth_1;
scaledPhotoHeight_2 = ratio_2 * scaledPhotoHeight_1;
scaledPhotoWidth_2 = ratio_2 * scaledPhotoWidth_1;
// Fim, ambas as dimensões foram redimensionadas
}
else{
scaledPhotoHeight_2 = scaledPhotoHeight_1;
scaledPhotoWidth_2 = scaledPhotoWidth_1;
}
} else{
float ratio = (float) deviceWidth / fotoOriginal.getWidth();
scaledPhotoHeight_1 = ratio * fotoOriginal.getHeight();
scaledPhotoWidth_1 = ratio * fotoOriginal.getWidth();
// Neste ponto a largura da foto foi redimensionado para ser igual a largura da tela,
// e a altura seguiu a proporção. Mas será que a altura ficou dentro da tela também?
float difAltura_2 = (float) scaledPhotoHeight_1 - deviceHeight;
// A altura ficou fora da tela e tem que ser redimensionada
if(difAltura_2 > 0){
float ratio_2 = (float) deviceHeight / scaledPhotoHeight_1;
scaledPhotoHeight_2 = ratio_2 * scaledPhotoHeight_1;
scaledPhotoWidth_2 = ratio_2 * scaledPhotoWidth_1;
// Fim, ambas as dimensões foram redimensionadas
}
else{
scaledPhotoHeight_2 = scaledPhotoHeight_1;
scaledPhotoWidth_2 = scaledPhotoWidth_1;
}
}
// Só 01 dimensão precisa ser ajustada
} else if(difAltura > 0 || difLargura > 0){
// Qual que tem que ser ajustada?
if(difAltura > 0) {
float ratio = (float) deviceHeight / fotoOriginal.getHeight();
scaledPhotoHeight_1 = ratio * fotoOriginal.getHeight();
scaledPhotoWidth_1 = ratio * fotoOriginal.getWidth();
} else{
float ratio = (float) deviceWidth / fotoOriginal.getWidth();
scaledPhotoHeight_1 = ratio * fotoOriginal.getHeight();
scaledPhotoWidth_1 = ratio * fotoOriginal.getWidth();
}
scaledPhotoHeight_2 = scaledPhotoHeight_1;
scaledPhotoWidth_2 = scaledPhotoWidth_1;
// Nenhuma dimensão está fora da tela
} else{
scaledPhotoHeight_2 = fotoOriginal.getHeight();
scaledPhotoWidth_2 = fotoOriginal.getWidth();
}
}
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
Toast.makeText(context, "(X, Y) = " + event.getX() + ", " + event.getY(), Toast.LENGTH_SHORT).show();
}
return false;
}
}
Delete the line
Context context = MyActivity.context;, let aloneContext context;and, in the builder of his class, placethis.context = context. See if it works– rsicarelli
@sicachester, unsuccessfully with this change...
– user2929914
I suggest leaving as @sicachester said, but you have already debugged and really onTouch function and if condition is being true?
– Skywalker
Try to create the event
onTouchwithin yourActivityand pass as a parameter in yourDrawView– rsicarelli