Question

【Android开发】如何 使得 android长按按钮=多次按下按钮

1个processbar,有2个button,定义了OnClickListener使得按钮按下时会增加或者减小processbar的值，如何做到长按按钮可以以一定时间间隔的去连续增加减小processbar的值。既长按连续触发某个事件 要怎么做。。谢谢啦

Answer 1

项目遇到需要实现按键点击同时，如果按住也能实现连续音量加的效果

本办法是通过按下标志开启线程固定间隔时间发送动作

重写setOnTouchListener事件

 

3. btn_bolumeup.setOnTouchListener(new OnTouchListener(){  

4.             @Override  
5.             public boolean onTouch(View v, MotionEvent event)  
6.             {  
7.                 Log.d("yj.chen","onTouch");  
8.                    if(event.getAction() == MotionEvent.ACTION_DOWN) {  
9.                        Log.d("yj.chen","ACTION_DOWN");  
10.                        longClicked = true;  
11.                        btn_bolumeup.setBackgroundResource (R.drawable.haier_pop_btn_nor_m);//  
12.                        Thread t = new Thread(){  
13.                            @Override  
14.                            public void run(){  
15.                                super.run();  
16.                                while(longClicked)  
17.                                {  
18.                                    sendcode = 24;  
19.                                    sendkeyenvet();  
20.                                    try{  
21.                                        Thread.sleep(250);  
22.                                    }catch(InterruptedException e){  
23.                                        e.printStackTrace();  
24.                                    }  
25.                                    Log.d("yj.chen","run end");  
26.                                }  
27.                            }  
28.                        };  
29.                        t.start();  
30.                          
31.                    } else if(event.getAction() == MotionEvent.ACTION_UP) {  
32.                        btn_bolumeup.setBackgroundResource (R.drawable.touch_control_btn);//touch_control_btn haier_pop_btn_sel_m  
33.                        longClicked = false;  
34.                        Log.d("yj.chen","ACTION_UP");  
35.                    }  
36.                 return true;    
37.   
38.             }  
39.         });  

Answer 2

onTouchEvent
按下时，handler 发送message， 处理时，开启更新ui的线程，
松开时，删除message，