如何在android中顺时针和逆时针旋转图像(指尖旋转)?
当我在屏幕上旋转我的指尖时,我必须按时钟方向和逆时针方向旋转叠加图像,不想以特定角度旋转。如果任何机构有解决方案,请帮助我。请尝试下面的链接,并在尝试之前检查链接:-如何在android中顺时针和逆时针旋转图像(指尖旋转)?,android,android-image,image-rotation,Android,Android Image,Image Rotation,当我在屏幕上旋转我的指尖时,我必须按时钟方向和逆时针方向旋转叠加图像,不想以特定角度旋转。如果任何机构有解决方案,请帮助我。请尝试下面的链接,并在尝试之前检查链接:- public void Rotate(View v) { ImageView img = (ImageView)findViewById(R.id.imageView01); Bitmap bmp = BitmapFactory.decodeResource(getResources(),R.drawable.
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);
}
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];
}};
}
导入android.app.Activity;
导入android.graphics.Bitmap;
导入android.graphics.Matrix;
导入android.graphics.drawable.BitmapDrawable;
导入android.os.Bundle;
导入android.view.view;
导入android.widget.AdapterView;
导入android.widget.ArrayAdapter;
导入android.widget.ImageView;
导入android.widget.SeekBar;
导入android.widget.Spinner;
公共类AndroidBitmap扩展活动{
//私有最终字符串imageInSD=“/sdcard/er.PNG”;
ImageView我的ImageView;
喷丝器;
SeekBar seekbarRotate;
私有静态最终字符串[]strScale
={“0.2x”、“0.5x”、“1.0x”、“2.0x”、“5.0x”};
私有静态最终浮点[]浮点刻度
={0.2F,0.5F,1F,2F,5F};
私有最终int defaultSpinnerScaleSelection=2;
专用阵列适配器刻度;
专用浮动光标=1F;
专用浮点数=0F;
位图;
int bmpWidth,bmpHeight;
/**在首次创建活动时调用*/
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myImageView=(ImageView)findViewById(R.id.ImageView);
喷丝头刻度=(喷丝头)findViewById(R.id.scale);
seekbarRotate=(SeekBar)findViewById(R.id.rotate);
adapterScale=新阵列适配器(此,
android.R.layout.simple_spinner_项目,strScale);
adapterScale.setDropDownViewResource(android.R.layout.simple\u微调器\u下拉菜单\u项);
喷丝头刻度。设置适配器(适配器刻度);
喷丝头刻度.设置选择(默认喷丝头刻度选择);
游标刻度=浮动刻度[defaultSpinnerScaleSelection];
BitmapDrawable img=(BitmapDrawable)getResources()
.getDrawable(R.drawable.ic_发射器);
bitmap=img.getBitmap();//BitmapFactory.decodeFile(imageInSD);
bmpWidth=bitmap.getWidth();
bmpHeight=bitmap.getHeight();
drawMatrix();
spinnerScale.setOnItemSelectedListener(spinnerScaleOnItemSelectedListener);
seekbarRotate.setonseekbarchaneglistener(seekbarrotatesekbarchaneglistener);
}
私有矩阵(){
矩阵=新矩阵();
矩阵。后标度(粗标度,粗标度);
旋转后基质(咖喱酸盐);
Bitmap resizedBitmap=Bitmap.createBitmap(位图,0,0,bmpWidth,bmpHeight,matrix,true);
myImageView.setImageBitmap(resizedBitmap);
}
private SeekBar.onseekbarchaneglistener seekbarrotate seekbarchaneglistener
=新SeekBar.onseekbarchaneglistener(){
@凌驾
更改了公共进程无效(SeekBar SeekBar,int progress,
布尔值(用户){
//TODO自动生成的方法存根
curRotate=(浮动)进度;
drawMatrix();
}
@凌驾
开始跟踪触摸时的公共无效(SeekBar SeekBar){
//TODO自动生成的方法存根
}
@凌驾
TopTrackingTouch(SeekBar SeekBar)上的公共无效{
//TODO自动生成的方法存根
}};
private Spinner.OnItemSelectedListener spinnerScaleOnItemSelectedListener
=新微调器。OnItemSelectedListener(){
@凌驾
已选择公共视图(AdapterView arg0、视图arg1、,
整数arg2,长arg3){
//TODO自动生成的方法存根
游标刻度=浮动刻度[arg2];
drawMatrix();
}
@凌驾
未选择公共无效(AdapterView arg0){
//TODO自动生成的方法存根
喷丝头刻度.设置选择(默认喷丝头刻度选择);
游标刻度=浮动刻度[defaultSpinnerScaleSelection];
}};
}
布局文件
main.xml
<?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>
希望这有帮助检查这个答案也许对你有帮助:什么是“图像”?什么是“覆盖”?你是指动画,还是旋转源图像本身?你可以多解释一点,或者添加你已经拥有的代码段将有更多帮助。你可以使用自定义图像视图并在draw@Commonware--overlay上旋转画布-我有一个标题所在的布局。所以当我旋转图像时,旋转后的图像应该在标题后面旋转,而不是在标题上方。用手指触摸,嗯!你以前为什么不说。在这里,你可以得到手指被触碰的位置坐标,捕捉运动,然后使用上面的逻辑,我希望这能解决问题。非常非常感谢老兄。。。它工作得很好。但我需要在多个手指(主要是两个手指)的触摸下旋转图像,只有一个手指除外。用一根手指可以很好地工作,但当我用两根手指使用它时,它先前的位置会随着眨眼而改变。所以你能帮我找到解决这个问题的办法吗。提前谢谢。