package com.example.myapplication;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity implements View.OnTouchListener {
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView)findViewById(R.id.text);
textView.setOnTouchListener(this);
}
float oldXvalue;
float oldYvalue;
@Override
public boolean onTouch(View v, MotionEvent event) {
int width = ((ViewGroup) v.getParent()).getWidth() - v.getWidth();
int height = ((ViewGroup) v.getParent()).getHeight() - v.getHeight();
if (event.getAction() == MotionEvent.ACTION_DOWN) {
oldXvalue = event.getX();
oldYvalue = event.getY();
// Log.i("Tag1", "Action Down X" + event.getX() + "," + event.getY());
Log.i("Tag1", "Action Down rX " + event.getRawX() + "," + event.getRawY());
} else if (event.getAction() == MotionEvent.ACTION_MOVE) {
v.setX(event.getRawX() - oldXvalue);
v.setY(event.getRawY() - (oldYvalue + v.getHeight()));
// Log.i("Tag2", "Action Down " + me.getRawX() + "," + me.getRawY());
} else if (event.getAction() == MotionEvent.ACTION_UP) {
if (v.getX() > width && v.getY() > height) {
v.setX(width);
v.setY(height);
} else if (v.getX() < 0 && v.getY() > height) {
v.setX(0);
v.setY(height);
} else if (v.getX() > width && v.getY() < 0) {
v.setX(width);
v.setY(0);
} else if (v.getX() < 0 && v.getY() < 0) {
v.setX(0);
v.setY(0);
} else if (v.getX() < 0 || v.getX() > width) {
if (v.getX() < 0) {
v.setX(0);
v.setY(event.getRawY() - oldYvalue - v.getHeight());
} else {
v.setX(width);
v.setY(event.getRawY() - oldYvalue - v.getHeight());
}
} else if (v.getY() < 0 || v.getY() > height) {
if (v.getY() < 0) {
v.setX(event.getRawX() - oldXvalue);
v.setY(0);
} else {
v.setX(event.getRawX() - oldXvalue);
v.setY(height);
}
}
}
return true;
}
}
