借助 seekbar 进行放大和缩小的 Android 程序？

Question

我想根据搜索栏的运动放大和缩小图像! !任何人都可以帮助我做到这一点，请您及时回复，我们将不胜感激! ! !

Answer 1

onProgressChanged() 方法做我想做的事! !

公共(public)类 MainActivity 扩展 Activity 实现 OnSeekBarChangeListener{

private SeekBar mSeekBar;
Bitmap bm;
ImageView image;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mSeekBar = (SeekBar) findViewById(R.id.seekBar);
    mSeekBar.setOnSeekBarChangeListener((OnSeekBarChangeListener) this);
   image=(ImageView)findViewById(R.id.image);
   bm=BitmapFactory.decodeResource(getResources(), R.drawable.sachin);
}

@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

     Bitmap resizedbitmap=Bitmap.createScaledBitmap(bm,10, 10, true);

      if(progress>0&&progress<=25)
      {
           resizedbitmap=Bitmap.createScaledBitmap(bm,70, 70, true);
      }
      if(progress>26&&progress<=50)
      {
           resizedbitmap=Bitmap.createScaledBitmap(bm,120, 120, true);
      }
      if(progress>51&&progress<=75)
      {
           resizedbitmap=Bitmap.createScaledBitmap(bm,180, 180, true);
      }
      if(progress>76&&progress<=100)
      {
          resizedbitmap=Bitmap.createScaledBitmap(bm,220, 220, true);
      }

      image.setImageBitmap(resizedbitmap);

}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}
@Override
public void onStopTrackingTouch(SeekBar seekBar)

{
    mSeekBar.setSecondaryProgress(seekBar.getProgress());

}
@Override
public boolean onCreateOptionsMenu(Menu menu) {

    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}