我必须在时钟方向和逆时针方向旋转图像,因为我的指尖在屏幕上旋转,不想以特定的角度旋转。如果有任何机构有解决方案,请帮助我。
答案 0 :(得分:1)
选中此答案可能会对您有所帮助:How can i use RotateAnimation to rotate a circle?
答案 1 :(得分:0)
尝试以下链接并在尝试之前检查this链接: -
public void Rotate(View v)
{
ImageView img = (ImageView)findViewById(R.id.imageView01);
Bitmap bmp = BitmapFactory.decodeResource(getResources(),R.drawable.bharath);
// Getting width & height of the given image.
int w = bmp.getWidth();
int h = bmp.getHeight();
// Setting pre rotate to 90
Matrix mtx = new Matrix();
mtx.preRotate(90);
// Rotating Bitmap
Bitmap rotatedBMP = Bitmap.createBitmap(bmp, 0, 0, w, h, mtx, true);
BitmapDrawable bmd = new BitmapDrawable(rotatedBMP);
img.setImageBitmap(rotatedBMP);
}
答案 2 :(得分:0)
试试这个
AndroidBitmap.java
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.Spinner;
public class AndroidBitmap extends Activity {
//private final String imageInSD = "/sdcard/er.PNG";
ImageView myImageView;
Spinner spinnerScale;
SeekBar seekbarRotate;
private static final String[] strScale
= {"0.2x", "0.5x", "1.0x", "2.0x", "5.0x"};
private static final Float[] floatScale
= {0.2F, 0.5F, 1F, 2F, 5F};
private final int defaultSpinnerScaleSelection = 2;
private ArrayAdapter<String> adapterScale;
private float curScale = 1F;
private float curRotate = 0F;
Bitmap bitmap;
int bmpWidth, bmpHeight;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myImageView = (ImageView)findViewById(R.id.imageview);
spinnerScale = (Spinner)findViewById(R.id.scale);
seekbarRotate = (SeekBar)findViewById(R.id.rotate);
adapterScale = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, strScale);
adapterScale.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerScale.setAdapter(adapterScale);
spinnerScale.setSelection(defaultSpinnerScaleSelection);
curScale = floatScale[defaultSpinnerScaleSelection];
BitmapDrawable img = (BitmapDrawable) getResources()
.getDrawable(R.drawable.ic_launcher);
bitmap = img.getBitmap();//BitmapFactory.decodeFile(imageInSD);
bmpWidth = bitmap.getWidth();
bmpHeight = bitmap.getHeight();
drawMatrix();
spinnerScale.setOnItemSelectedListener(spinnerScaleOnItemSelectedListener);
seekbarRotate.setOnSeekBarChangeListener(seekbarRotateSeekBarChangeListener);
}
private void drawMatrix(){
Matrix matrix = new Matrix();
matrix.postScale(curScale, curScale);
matrix.postRotate(curRotate);
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bmpWidth, bmpHeight, matrix, true);
myImageView.setImageBitmap(resizedBitmap);
}
private SeekBar.OnSeekBarChangeListener seekbarRotateSeekBarChangeListener
= new SeekBar.OnSeekBarChangeListener(){
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
curRotate = (float)progress;
drawMatrix();
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}};
private Spinner.OnItemSelectedListener spinnerScaleOnItemSelectedListener
= new Spinner.OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
curScale = floatScale[arg2];
drawMatrix();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
spinnerScale.setSelection(defaultSpinnerScaleSelection);
curScale = floatScale[defaultSpinnerScaleSelection];
}};
}
布局文件
main.xml中
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello, Android image rotate"
/>
<Spinner
android:id="@+id/scale"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<SeekBar
android:id="@+id/rotate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="5px"
android:max="360"
android:progress="0"
/>
<ImageView
android:id="@+id/imageview"
android:layout_gravity="center"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="center"
/>
</LinearLayout>
希望这有帮助