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| package com.sabar.text1;
import android.graphics.Matrix;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.widget.ImageView;
import android.graphics.Matrix;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.widget.ImageView;
import android.graphics.Matrix;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.widget.ImageView;
import android.graphics.Matrix;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.widget.ImageView;
import android.graphics.Matrix;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity {
ImageView imageView;
Matrix matrix= new Matrix();
Float scale=1f;
ScaleGestureDetector SGD;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView= (ImageView) findViewById(R.id.imageView);
SGD=new ScaleGestureDetector(this,new ScaleListener());
}
private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener{
@Override
public boolean onScale (ScaleGestureDetector detector){
scale=scale * detector.getScaleFactor();
scale=Math.max(0.1f,Math.min(scale,5f));
matrix.setScale(scale, scale);
imageView.setImageMatrix(matrix);
return true;
}
}
@Override
public boolean onTouchEvent(MotionEvent event){
SGD.onTouchEvent(event);
return true;
}
} |
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