80,356
社区成员
发帖
与我相关
我的任务
分享
public class DisplayImage extends Activity implements OnTouchListener, OnGestureListener {
private static final String TAG = "DisplayImage";
private static final int FLING_MIN_DISTANCE = 50;
private static final int FLING_MIN_VELOCITY = 100;
private GestureDetector mGestureDetector;
/* 相关变量声明 */
private ImageView mImageView;
private Button mButton01;
private Button mButton02;
private FrameLayout layout1;
private LinearLayout layoutImage;
private Bitmap bmp;
private int id=0;
private int displayWidth;
private int displayHeight;
private float scaleWidth=1;
private float scaleHeight=1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE); // 隐藏标题
// 设置全屏Flag标识
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
/* 加载display.xml Layout */
setContentView(R.layout.display);
/* 取得屏幕分辨率大小 */
DisplayMetrics dm=new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
displayWidth=dm.widthPixels;
displayHeight=dm.heightPixels;
/* 初始化相关变量 */
Bundle bundle = this.getIntent().getExtras();
Integer imageId = bundle.getInt("imageId");
Log.i(TAG, "onCreate, imageId = " + imageId);
bmp = BitmapFactory.decodeResource(getResources(), imageId);
mImageView = (ImageView)findViewById(R.id.myImageView);
mImageView.setImageBitmap(bmp);
mImageView.setOnTouchListener(this);
mImageView.setLongClickable(true);
mGestureDetector = new GestureDetector(this);
layout1 = (FrameLayout)findViewById(R.id.layout1);
layoutImage = (LinearLayout)findViewById(R.id.layoutImage);
mButton01 = (Button)findViewById(R.id.myButton1);
mButton02 = (Button)findViewById(R.id.myButton2);
/* 缩小按钮onClickListener */
mButton01.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
small();
}
});
/* 放大按钮onClickListener */
mButton02.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
big();
}
});
}
// 用户轻触触摸屏,由1个MotionEvent ACTION_DOWN触发
@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
// Toast.makeText(this, "onDown", Toast.LENGTH_SHORT).show();
Log.i(TAG, "onDown...");
return false;
}
/* 用户按下触摸屏、快速移动后松开,由1个MotionEvent ACTION_DOWN,
* 多个ACTION_MOVE, 1个ACTION_UP触发
* 参数解释:
* e1:第1个ACTION_DOWN MotionEvent
* e2:最后一个ACTION_MOVE MotionEvent
* velocityX:X轴上的移动速度,像素/秒
* velocityY:Y轴上的移动速度,像素/秒
* 触发条件 :
* X轴的坐标位移大于FLING_MIN_DISTANCE,且移动速度大于FLING_MIN_VELOCITY个像素/秒
* @see android.view.GestureDetector$OnGestureListener#onFling(android.view.MotionEvent, android.view.MotionEvent, float, float)
*/
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
Log.i(TAG, "onFling... e1.getX() = " + e1.getX() + ", e2.getX() = " + e2.getX());
if (e1.getX() - e2.getX() > FLING_MIN_DISTANCE
&& Math.abs(velocityX) > FLING_MIN_VELOCITY) {
// Fling left
Toast.makeText(this, "Fling Left", Toast.LENGTH_SHORT).show();
} else if (e2.getX() - e1.getX() > FLING_MIN_DISTANCE
&& Math.abs(velocityX) > FLING_MIN_VELOCITY) {
// Fling right
Toast.makeText(this, "Fling Right", Toast.LENGTH_SHORT).show();
}
return false;
}
// 用户长按触摸屏,由多个MotionEvent ACTION_DOWN触发
@Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub
Log.i(TAG, "onLongPress...");
}
// 用户按下触摸屏,并拖动,由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE触发
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
// TODO Auto-generated method stub
Log.i(TAG, "onScroll...");
return false;
}
// 用户轻触触摸屏,尚未松开或拖动,由一个1个MotionEvent ACTION_DOWN触发
// 注意和onDown()的区别,强调的是没有松开或者拖动的状态
@Override
public void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub
Log.i(TAG, "onShowPress...");
}
// 用户(轻触触摸屏后)松开,由一个1个MotionEvent ACTION_UP触发
@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
Log.i(TAG, "onSingleTapUp...");
return false;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
Log.i(TAG, "onTouch...");
// Set button visible
mButton01.setVisibility(View.VISIBLE);
mButton02.setVisibility(View.VISIBLE);
return mGestureDetector.onTouchEvent(event);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
super.onKeyDown(keyCode, event);
Log.i(TAG, "onKeyDown...");
// Set button visible
mButton01.setVisibility(View.VISIBLE);
mButton02.setVisibility(View.VISIBLE);
return true;
}
/* 图片缩小的method */
private void small() {
int bmpWidth=bmp.getWidth();
int bmpHeight=bmp.getHeight();
Log.i(TAG, "bmpWidth = " + bmpWidth + ", bmpHeight = " + bmpHeight);
/* 设置图片缩小的比例 */
double scale=0.8;
/* 计算出这次要缩小的比例 */
scaleWidth=(float) (scaleWidth*scale);
scaleHeight=(float) (scaleHeight*scale);
/* 产生reSize后的Bitmap对象 */
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
Bitmap resizeBmp = Bitmap.createBitmap(bmp,0,0,bmpWidth,
bmpHeight,matrix,true);
if(id==0) {
/* 如果是第一次按,就删除原来默认的ImageView */
layoutImage.removeView(mImageView);
} else {
/* 如果不是第一次按,就删除上次放大缩小所产生的ImageView */
layoutImage.removeView((ImageView)findViewById(id));
}
/* 产生新的ImageView,放入reSize的Bitmap对象,再放入Layout中 */
id++;
ImageView imageView = new ImageView(this);
imageView.setId(id);
imageView.setImageBitmap(resizeBmp);
imageView.setOnTouchListener(this);
imageView.setLongClickable(true);
layoutImage.addView(imageView);
Log.i(TAG, "imageView.getWidth() = " + imageView.getWidth()
+ ", imageView.getHeight() = " + imageView.getHeight());
setContentView(layout1);
/* 因为图片放到最大时放大按钮会disable,所以在缩小时把它重设为enable */
mButton02.setEnabled(true);
mButton02.setTextColor(Color.MAGENTA);
}
/* 图片放大的method */
private void big() {
int bmpWidth=bmp.getWidth();
int bmpHeight=bmp.getHeight();
Log.i(TAG, "bmpWidth = " + bmpWidth + ", bmpHeight = " + bmpHeight);
/* 设置图片放大的比例 */
double scale=1.25;
/* 计算这次要放大的比例 */
scaleWidth=(float)(scaleWidth*scale);
scaleHeight=(float)(scaleHeight*scale);
/* 产生reSize后的Bitmap对象 */
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
Bitmap resizeBmp = Bitmap.createBitmap(bmp,0,0,bmpWidth,
bmpHeight,matrix,true);
if(id==0) {
/* 如果是第一次按,就删除原来设置的ImageView */
layoutImage.removeView(mImageView);
} else {
/* 如果不是第一次按,就删除上次放大缩小所产生的ImageView */
layoutImage.removeView((ImageView)findViewById(id));
}
/* 产生新的ImageView,放入reSize的Bitmap对象,再放入Layout中 */
id++;
ImageView imageView = new ImageView(this);
imageView.setId(id);
imageView.setImageBitmap(resizeBmp);
imageView.setOnTouchListener(this);
imageView.setLongClickable(true);
layoutImage.addView(imageView);
setContentView(layout1);
/* 如果再放大会超过屏幕大小,就把Button disable */
if( scaleWidth * scale * bmpWidth > bmpWidth * 2 ||
scaleHeight * scale * bmpHeight > bmpWidth * 2 ||
scaleWidth * scale * bmpWidth > displayWidth * 3 ||
scaleHeight * scale * bmpHeight > displayHeight * 3) {
mButton02.setEnabled(false);
mButton02.setTextColor(Color.GRAY);
} else {
mButton02.setEnabled(true);
mButton02.setTextColor(Color.MAGENTA);
}
}
}
public class Main extends Activity implements View.OnTouchListener, GestureDetector.OnGestureListener {
private GestureDetector mDetector;
private static final int FLING_MIN_DISTANCE = 50;
private static final int FLING_MIN_VELOCITY = 100;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv = (TextView) findViewById(R.id.tv);
tv.setOnTouchListener(this);
tv.setLongClickable(true);
tv.setText("Test....");
mDetector = new GestureDetector(this);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
//Toast.makeText(this, "onTouch", Toast.LENGTH_SHORT).show();
return mDetector.onTouchEvent(event);
}
@Override
public boolean onDown(MotionEvent motionEvent) {
return true;
}
@Override
public void onShowPress(MotionEvent motionEvent) {
}
@Override
public boolean onSingleTapUp(MotionEvent motionEvent) {
return false;
}
@Override
public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent2, float v, float v2) {
return false;
}
@Override
public void onLongPress(MotionEvent motionEvent) {
}
@Override
public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent2, float v, float v2) {
Toast.makeText(this, "onFling" + motionEvent.getX(), Toast.LENGTH_SHORT).show();
return false;
}
}
public boolean dispatchTouchEvent(MotionEvent event)
{
if(mGestureDetector.onTouchEvent(event))
{
event.setAction(MOtionEvent.ACTION_CANCLE);
}
return super.dispatchTouchEvent(event);
}