Android实现iPhone晃动撤销输入功能Android仿微信摇一摇功能

AlertDialog.Builder builder = new AlertDialog.Builder(this);
dialog = builder.create();
LayoutInflater inflater = LayoutInflater.from(this);
LinearLayout layout = (LinearLayout) inflater.inflate(R.layout.alertdialog, null);

dialog.setCanceledOnTouchOutside(false);

dialog.show();
dialog.setContentView(layout, new LayoutParams(400, 250));

float values[] = event.values;
float x = values[0];// x轴方向的重力加速度
float y = values[1];// y轴方向的重力加速度
float z = values[2];// z轴方向的重力加速度

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.app.Activity;
import android.app.AlertDialog;
public classMainAextendsActivity{
private SensorManagersensorManager;
private Vibratorvibrator;//手机的振动
private EditTexttxt_content;
private Buttonbtn_delete,btn_cancle;
private AlertDialogdialog;
private Sensorsensor;
private booleanhasShaked=false;//判断是否已经摇晃的标志位
private SensorEventListenerlistener=newSensorEventListener(){
@Override
public void on SensorChanged(SensorEventevent){
//TODOAuto-generatedmethodstub
floatvalues[]=event.values;
floatx=values[0];//x轴方向的重力加速度
floaty=values[1];//y轴方向的重力加速度
floatz=values[2];//z轴方向的重力加速度
//这里设置的一个阈值为18，经测试比较满足一般的摇晃，也可以自己按需定义修改
intmedumValue=18;
if((Math.abs(x)>medumValue||Math.abs(y)>medumValue||Math
.abs(z)>medumValue)&&hasShaked==false){
if((!(txt_content.getText().toString().equals("")))
&&hasShaked==false){
vibrator.vibrate(200);//设置振动的频率
showDialog();
hasShaked=true;
}
}
}
@Override
publicvoidonAccuracyChanged(Sensorsensor,intaccuracy){
//TODOAuto-generatedmethodstub
}
};
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
sensorManager=(SensorManager)getSystemService(SENSOR_SERVICE);
sensor=sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
vibrator=(Vibrator)getSystemService(VIBRATOR_SERVICE);
txt_cOntent=(EditText)findViewById(R.id.txt_content);
}
private void showDialog(){
AlertDialog.Builderbuilder=newAlertDialog.Builder(this);
dialog=builder.create();
LayoutInflaterinflater=LayoutInflater.from(this);
LinearLayoutlayout=(LinearLayout)inflater.inflate(
R.layout.alertdialog,null);
dialog.setCanceledOnTouchOutside(false);//点击框外的空白处不会让对话框消失
dialog.show();
dialog.setContentView(layout,newLayoutParams(400,250));
btn_delete=(Button)layout.findViewById(R.id.btn_delete);
btn_delete.setOnClickListener(newOnClick());
btn_cancle=(Button)layout.findViewById(R.id.btn_cancle);
btn_cancle.setOnClickListener(newOnClick());
}
classOnClickimplementsandroid.view.View.OnClickListener{
@Override
publicvoidonClick(Viewv){
//TODOAuto-generatedmethodstub
switch(v.getId()){
caseR.id.btn_delete:
txt_content.getText().clear();
dialog.dismiss();
hasShaked=false;
break;
caseR.id.btn_cancle:
dialog.dismiss();
hasShaked=false;
default:
break;
}
}
}
@Override
protectedvoidonResume(){
//TODOAuto-generatedmethodstub
super.onResume();
//注册监听事件
if(sensorManager!=null){
sensorManager.registerListener(listener,sensor,
SensorManager.SENSOR_DELAY_NORMAL);
}
}
@Override
protectedvoidonPause(){
//TODOAuto-generatedmethodstub
super.onPause();
//取消监听
if(sensorManager!=null){
sensorManager.unregisterListener(listener);
}
}
}