结构

1：监听来电事件
2：查询，打开，数据库。匹配正则表达式
3：监听用户手势

1：监听来电事件

1:拿到电话管理器
  TelePMG = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
2:创建电话监听器类继承PhoneStateListener
  class MyPhoneStateListener extends PhoneStateListener{
        //重写电话状态改变的方法
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            switch (state){
                case TelephonyManager.CALL_STATE_IDLE:
                    //电话空闲状态
                    System.out.println("空闲状态");
                    if(mWindowManager!=null&&toast_view!=null){
                        //挂断电话的时候移除吐司
                        mWindowManager.removeView(toast_view);
                    }
                    break;
                case TelephonyManager.CALL_STATE_OFFHOOK:
                    //忙碌状态，就是占线
                    break;
                case TelephonyManager.CALL_STATE_RINGING:
                    //来电状态
                    System.out.println("来电了号码是"+incomingNumber);
                    //来电后打印吐司
                    showToast(incomingNumber);
                    break;
            }
            super.onCallStateChanged(state, incomingNumber);
        }
    }
3:创建电话监听器的对象
  myPhoneStateListener = new MyPhoneStateListener();
4:使用电话管理器的listen方法绑定监听器
  TelePMG.listen(myPhoneStateListener,PhoneStateListener.LISTEN_CALL_STATE);
5:使用完毕后记得用CLOSE方法关闭

2：查询，打开，数据库。匹配正则表达式

public class SelectAdressdb {
    //数据库地址
    public static String  PATH = "data/data/com.joker.mobilesafe/files/address.db";
    private static String adress;
    //封装查询的方法
    public  static String SelectAdress (String phone){
        //截取电话前7位
        //匹配正则表达式，不然输入一个没有7位的数字时候会报错
        System.out.println(phone+"```````````````");
        String regular = "^1[3-8]\\d{9}";
        if (phone.matches(regular)){
            phone = phone.substring(0,7);
            SQLiteDatabase db = SQLiteDatabase.openDatabase(PATH, null, SQLiteDatabase.OPEN_READONLY);
            //表的名字，需要得到查询结果的字段，查询条件，查询条件的值，是否分组，分组后查询条件，是否排序
            Cursor cursor = db.query("data1", new String[]{"outkey"}, "id=?", new String[]{phone}, null, null, null);
            if (cursor.moveToNext()){
                //这里传入的0 是上面第二个条件数组的下标值
                String outkey = cursor.getString(0);
                Cursor indexCursor = db.query("data2", new String[]{"location"}, "id=?", new String[]{outkey}, null, null, null);
                if (indexCursor.moveToNext()){
                    adress = indexCursor.getString(0);
                }else{
                    adress ="未知号码";
                }
            }else {
                adress ="未知号码";
            }
        }else {
            int length = phone.length();
            switch (length){
                case 3:
                    adress = "你难道连报警电话都不知道？";
                    break;
                default:
                    adress = "不知道是哪种情况";
                    break;
            }
        }
        return adress;
    }
}

3：监听用户手势

1:创建监听用户手势的类（第二个参数传入监听用户手势的监听器）
  GestureDetector gestureDetector = new GestureDetector(this,SimpleOnGestureListener)
2:实现监听器的onFling方法（手势起点参数，手势移动当前的参数，每秒x轴方向移动的像素，每秒y轴方向移动的像素）
  public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                if (e1.getX()-e2.getX()>0){
                    //下一页
                    String phone = et_phone_number.getText().toString();
                    if(!TextUtils.isEmpty(phone)){
                        Intent intent = new Intent(Set_up3.this, Set_up4.class);
                        startActivity(intent);
                        SpUtil.PutString(getApplicationContext(), FianlMath.CONTACT_MAN, phone);
                        finish();
                        overridePendingTransition(R.anim.next_anim_in,R.anim.next_anim_out);
                    }else {
                        Toast.makeText(Set_up3.this,"请输入联系人",Toast.LENGTH_SHORT).show();
                    }
                }else if (e1.getX()-e2.getX()<0){
                    //上一页
                    Intent intent = new Intent(Set_up3.this, Set_up2.class);
                    startActivity(intent);
                    finish();
                    overridePendingTransition(R.anim.up_anim_in,R.anim.up_anim_out);
                }
                return super.onFling(e1, e2, velocityX, velocityY);
            }

重写ontouchevent方法（这个方法用来捕捉用户的手势）
      public boolean onTouchEvent(MotionEvent event) {
        gestureDetector.onTouchEvent(event);
        return super.onTouchEvent(event);
    }