Android Touch事件傳遞機制

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例子一：  只有OnTouch和OnItemClick

actualListView.setOnTouchListener(new OnTouchListener() {                        @Override            public boolean onTouch(View v, MotionEvent event) {                switch (event.getAction()) {                case MotionEvent.ACTION_DOWN:                    Toast.makeText(MainActivity.this, "DOWN",                             Toast.LENGTH_SHORT).show();                    break;                case MotionEvent.ACTION_UP:                    Toast.makeText(MainActivity.this, "UP",                             Toast.LENGTH_SHORT).show();                    break;                }                return false;   //返回false之後　　　　　　} }); actualListView.setOnItemClickListener(new OnItemClickListener() { 　　　　　　@Override 　　　　　　public void onItemClick(AdapterView<?> parent, View view, int position, long id) {　　　　　　　　 Toast.makeText(MainActivity.this, "setOnClickListener", Toast.LENGTH_SHORT).show(); 　　　　　　} });

 

先走ACTION_DOWN，ACTION_UP，最後走onItemClick。

 

 

例子二：只有OnTouch和OnItemClick

actualListView.setOnTouchListener(new OnTouchListener() {                        @Override            public boolean onTouch(View v, MotionEvent event) {                switch (event.getAction()) {                case MotionEvent.ACTION_DOWN:                    Toast.makeText(MainActivity.this, "DOWN",                             Toast.LENGTH_SHORT).show();                    break;                case MotionEvent.ACTION_UP:                    Toast.makeText(MainActivity.this, "UP",                             Toast.LENGTH_SHORT).show();                    break;                }                return true;      //返回true之後 
　　　　　　}
 }); 

actualListView.setOnItemClickListener(new OnItemClickListener() {

　　　　　　 @Override 
　　　　　　 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
　　　　　　　　　　 Toast.makeText(MainActivity.this, "setOnClickListener", Toast.LENGTH_SHORT).show(); 
　　　　　　　} 
});

先走ACTION_DOWN，ACTION_UP，   onItemClick不走

 

例子三：只有OnTouch和OnItemClick和dispatchTouchEvent

@Override    public boolean dispatchTouchEvent(MotionEvent ev) {        switch (ev.getAction()) {        case MotionEvent.ACTION_DOWN:            Toast.makeText(MainActivity.this, "dispatch DOWN",                     Toast.LENGTH_SHORT).show();            break;        case MotionEvent.ACTION_UP:            Toast.makeText(MainActivity.this, "dispatch UP",                     Toast.LENGTH_SHORT).show();            break;        }                return super.dispatchTouchEvent(ev);    }

actualListView.setOnTouchListener(new OnTouchListener() {                        @Override            public boolean onTouch(View v, MotionEvent event) {                switch (event.getAction()) {                case MotionEvent.ACTION_DOWN:                    Toast.makeText(MainActivity.this, "DOWN",                             Toast.LENGTH_SHORT).show();                    break;                case MotionEvent.ACTION_UP:                    Toast.makeText(MainActivity.this, "UP",                             Toast.LENGTH_SHORT).show();                    break;                }                return false;   //返回false之後　　　　　　} });

actualListView.setOnItemClickListener(new OnItemClickListener() { 　　　　　　@Override 　　　　　　public void onItemClick(AdapterView<?> parent, View view, int position, long id) {　　　　　　　　 Toast.makeText(MainActivity.this, "setOnClickListener", Toast.LENGTH_SHORT).show(); 　　　　　　} });

先走dispatchTouchEvent的ACTION_DOWN------------>OnTouch的ACTION_DOWN------------->dispatchTouchEvent的ACTION_UP

----------------->OnTouch的ACTION_UP----------------->onItemClick

 

 

 

 

 

例子四：只有OnTouch和OnItemClick和dispatchTouchEvent

    @Override    public boolean dispatchTouchEvent(MotionEvent ev) {        switch (ev.getAction()) {        case MotionEvent.ACTION_DOWN:            Toast.makeText(MainActivity.this, "dispatch DOWN",                     Toast.LENGTH_SHORT).show();            break;        case MotionEvent.ACTION_UP:            Toast.makeText(MainActivity.this, "dispatch UP",                     Toast.LENGTH_SHORT).show();            break;        }                return super.dispatchTouchEvent(ev);    }

actualListView.setOnTouchListener(new OnTouchListener() {                        @Override            public boolean onTouch(View v, MotionEvent event) {                switch (event.getAction()) {                case MotionEvent.ACTION_DOWN:                    Toast.makeText(MainActivity.this, "DOWN",                             Toast.LENGTH_SHORT).show();                    break;                case MotionEvent.ACTION_UP:                    Toast.makeText(MainActivity.this, "UP",                             Toast.LENGTH_SHORT).show();                    break;                }                return true;      //返回true之後 
　　　　　　}
 }); 

actualListView.setOnItemClickListener(new OnItemClickListener() {

　　　　　　 @Override 
　　　　　　 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
　　　　　　　　　　 Toast.makeText(MainActivity.this, "setOnClickListener", Toast.LENGTH_SHORT).show(); 
　　　　　　　} 
});

先走dispatchTouchEvent的ACTION_DOWN------------>OnTouch的ACTION_DOWN------------->dispatchTouchEvent的ACTION_UP

----------------->OnTouch的ACTION_UP

 

 

 

 

 

 

例子五：只有OnTouch和OnItemClick和dispatchTouchEvent

    @Override    public boolean dispatchTouchEvent(MotionEvent ev) {        switch (ev.getAction()) {        case MotionEvent.ACTION_DOWN:            Toast.makeText(MainActivity.this, "dispatch DOWN",                     Toast.LENGTH_SHORT).show();            return true;    //這兒無論是true還是false，都會導致OnTouch和OnItemClick不走，因為沒有下面的super來分發事件        case MotionEvent.ACTION_UP:            Toast.makeText(MainActivity.this, "dispatch UP",                     Toast.LENGTH_SHORT).show();            return true;   //這兒無論是true還是false，都會導致OnTouch和OnItemClick不走，因為沒有下面的super來分發事件

　　　　} 
　　　　return super.dispatchTouchEvent(ev); 
}

actualListView.setOnTouchListener(new OnTouchListener() {                        @Override            public boolean onTouch(View v, MotionEvent event) {                switch (event.getAction()) {                case MotionEvent.ACTION_DOWN:                    Toast.makeText(MainActivity.this, "DOWN",                             Toast.LENGTH_SHORT).show();                    break;                case MotionEvent.ACTION_UP:                    Toast.makeText(MainActivity.this, "UP",                             Toast.LENGTH_SHORT).show();                    break;                }                return false;   //返回false之後　　　　　　} });

actualListView.setOnItemClickListener(new OnItemClickListener() { 　　　　　　@Override 　　　　　　public void onItemClick(AdapterView<?> parent, View view, int position, long id) {　　　　　　　　 Toast.makeText(MainActivity.this, "setOnClickListener", Toast.LENGTH_SHORT).show(); 　　　　　　} });

先走dispatchTouchEvent的ACTION_DOWN---------------------->dispatchTouchEvent的ACTION_UP

Android Touch事件傳遞機制