常用的小技术点收集

常用的小技术点:

1、给RadioButton设置图片的时候,我们想设置图片的大小(代码设置),

Drawable drawable = getResources().getDrawable(R.mipmap.menu_location);
drawable.setBounds(0, 0, 60, 60); //这是我项目中的要求,这里根据自己情况满足要求填写不是固定的
contentfragmentRbtnHome.setCompoundDrawables(drawable, null, null, null);

RadioButton代码设置如下:

     

2、fragment切换代码

 /**
 * 切换fragment
 *
 * @param position
 */
public void shouFragment(int position) {
    FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
    hideFragments(transaction);
    switch (position) {

        case 0:

            if (mapFragment == null) {
                mapFragment = (MapFragment) fragments.get(0);
                transaction.add(R.id.fl_frameLayout, mapFragment);
            } else {
                if (!mapFragment.isAdded()) {
                    transaction.add(R.id.fl_frameLayout, mapFragment);
                }
                transaction.show(mapFragment);
            }
            break;
        case 1:
            if (workingConditionFragment == null) {
                workingConditionFragment = (ReportFormsFragment) fragments.get(1);
                transaction.add(R.id.fl_frameLayout, workingConditionFragment);
            } else {
                if (!workingConditionFragment.isAdded()) {
                    transaction.add(R.id.fl_frameLayout, workingConditionFragment);
                }
                transaction.show(workingConditionFragment);
            }
            break;
        case 2:
            if (parameterMonitoringFragment == null) {
                parameterMonitoringFragment = (ParameterMonitoringFragment) fragments.get(2);
                transaction.add(R.id.fl_frameLayout, parameterMonitoringFragment);
            } else {
                if (!parameterMonitoringFragment.isAdded()) {
                    transaction.add(R.id.fl_frameLayout, parameterMonitoringFragment);
                }
                transaction.show(parameterMonitoringFragment);
            }
            break;

        case 3:
            if (alarmListFragment == null) {
                alarmListFragment = (AlarmListFragment) fragments.get(3);
                transaction.add(R.id.fl_frameLayout, alarmListFragment);
            } else {
                if (!alarmListFragment.isAdded()) {
                    transaction.add(R.id.fl_frameLayout, alarmListFragment);
                }
                transaction.show(alarmListFragment);
            }
            break;
        case 4:
            if (maintenanceServiceFragment == null) {
                maintenanceServiceFragment = (MaintenanceServiceFragment) fragments.get(4);
                transaction.add(R.id.fl_frameLayout, maintenanceServiceFragment);
            } else {
                if (!maintenanceServiceFragment.isAdded()) {
                    transaction.add(R.id.fl_frameLayout, maintenanceServiceFragment);
                }
                transaction.show(maintenanceServiceFragment);
            }
            break;

        case 5:
            if (settingFragment == null) {
                settingFragment = (SettingFragment) fragments.get(5);
                transaction.add(R.id.fl_frameLayout, settingFragment);
            } else {
                if (!settingFragment.isAdded()) {
                    transaction.add(R.id.fl_frameLayout, settingFragment);
                }
                transaction.show(settingFragment);
            }

            break;

        case 6:

            if (meFragment == null) {
                meFragment = (MeFragment) fragments.get(6);
                transaction.add(R.id.fl_frameLayout, meFragment);
            } else {
                if (!meFragment.isAdded()) {
                    transaction.add(R.id.fl_frameLayout, meFragment);
                }
                transaction.show(meFragment);
            }
            break;

        case 7:
            if (homeFragment == null) {
                homeFragment = (HomeFragment) fragments.get(7);
                transaction.add(R.id.fl_frameLayout, homeFragment);
            } else {

                if (!homeFragment.isAdded()) {
                    transaction.add(R.id.fl_frameLayout, homeFragment);
                }
                transaction.show(homeFragment);
            }
            break;
    }
    transaction.commit();
}

/**
 * 隐藏所有的fragment
 */
private void hideFragments(FragmentTransaction transaction) {
    if (homeFragment != null) {

        transaction.hide(homeFragment);
    }
    if (workingConditionFragment != null) {

        transaction.hide(workingConditionFragment);
    }
    if (mapFragment != null) {

        transaction.hide(mapFragment);
    }

    if (meFragment != null) {

        transaction.hide(meFragment);
    }

    if (settingFragment != null) {

        transaction.hide(settingFragment);
    }

    if (alarmListFragment != null) {
        transaction.hide(alarmListFragment);
    }

    if (parameterMonitoringFragment != null) {
        transaction.hide(parameterMonitoringFragment);

    }
    if (maintenanceServiceFragment != null) {

        transaction.hide(maintenanceServiceFragment);
    }

}

3、获取Color的几种方式

#11223344 格式,11位表示透明度,为0时完全透明,为255时完全不透明,后三个分量依次表示R,G,B颜色 
参数

获取Color的几种方式:
    int c1 = this.getResources().getColor(R.color.colorTest);
    int c2 = Color.parseColor("#FF0000");
    int c3 = 0xFF0000;
    int c4 = 0xFFFF0000;
    int c5= Color.argb(255,255,0,0);

4、隐藏软件盘的方法:

#通常我们的需求是,当我们停止操作输入,点击空白处,需要隐藏软键盘,在base中借助事件分发方式解决 
代码如下:

/**
 * 在Activity中点击其他部位隐藏软键盘
 */
@Override
public boolean onTouchEvent(MotionEvent event) {
    InputMethodManager manager = (InputMethodManager) 
    getSystemService(Context.INPUT_METHOD_SERVICE);
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        if (getCurrentFocus() != null && getCurrentFocus().getWindowToken() != null) {
            manager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 
            InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }
    return super.onTouchEvent(event);
}

 /**
 * 在Fragment中点击其他部位隐藏软键盘
 */
  mView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            InputMethodManager manager = (InputMethodManager) 
            getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                if (getActivity().getCurrentFocus() != null && getActivity().getCurrentFocus().getWindowToken() != 
                null) {
                    manager.hideSoftInputFromWindow(getActivity().getCurrentFocus().getWindowToken(), 
                    InputMethodManager.HIDE_NOT_ALWAYS);
                }
            }
            return false;
        }
      });

/**
 * 这个是让输入法状态发生逆转,如果当前未显示则显示出来。如果显示出来,则隐藏。
 */
public void hidekeybord() {
    InputMethodManager systemService = (InputMethodManager) 
    getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
    if (systemService != null) {
        systemService.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
    }
   }

 /**
 * 其它不变,隐藏软件盘的方法参数,还可以如下:
 */
 systemService .hideSoftInputFromWindow(passwdEdit.getWindowToken(), 0);

 以上四种情况根据各自的情况进行选择,解决问题

5、选择器:

android:state_pressed

     一个布尔值,如果这个项目是在对象被按下时使用,那么就要设置为true。(如,按钮被触摸或点击 
时。)false应该用于默认的非按下状态。

android:state_focused

     一个布尔值,如果这个项目是在对象获取焦点时使用,那么就要设置为true。如,一个选项标签被打开 
时。如果这个项目要用于对象没有被被选择的时候,那么就要设置为false。

android:state_checkable

     一个布尔值,如果这个项目要用于对象的可选择状态,那么就要设置为true。如果这个项目要用于不可选 
状态,那么就要设置为false。(它只用于一个对象在可选和不可选之间的转换)。

android:state_checked

     一个布尔值,如果这个项目要用于对象被勾选的时候,那么就要设置为true。否者设为false。

android:state_enabled

     一个布尔值,如果这个项目要用于对象可用状态(接受触摸或点击事件的能力),那么就要设置为true, 
 否者设置为false。

 事例代码:
 
 
 
 
 
 
 
 

6、获取状态栏的高度,代码如下:

    /**
 * 获取状态栏高度
 *
 * @return
 */
protected int getStatusBarHeight() {
    Class c = null;
    Object obj = null;
    Field field = null;
    int x = 0, sbar = 20;//,我项目是20dp,有的资料说是38dp这个根据自己详情进行判断
    try {
        c = Class.forName("com.android.internal.R$dimen");
        obj = c.newInstance();
        field = c.getField("status_bar_height");
        x = Integer.parseInt(field.get(obj).toString());
        sbar = getResources().getDimensionPixelSize(x);
    } catch (Exception e1) {
        e1.printStackTrace();
    }
    return sbar;
    }
}

7、简单权限判断工具类,解决项目中多出使用危险权限,重复编写权限判断代码。(用第三方框架除外)

public class PermisionUtils {
// Storage Permissions
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {Manifest.permission.READ_EXTERNAL_STORAGE, 
Manifest.permission.WRITE_EXTERNAL_STORAGE};


public static void verifyStoragePermissions(Activity activity) {
    int permission = ActivityCompat.checkSelfPermission(activity, 
Manifest.permission.WRITE_EXTERNAL_STORAGE);
    if (permission != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE, 
REQUEST_EXTERNAL_STORAGE);
    }

}
}

8、沉浸式状态栏工具类

public class StatusBarColorUtils {
private StatusBarColorUtils() {

}

public static void setStatusBarColor(Activity activity, int color) {
    /**
     * 浸入式
     */
    if (hasLollipop()) {
        Window window = activity.getWindow();
        window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
                | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        window.setStatusBarColor(color);
    }
}

public static boolean hasLollipop() {
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
}
}

你可能感兴趣的:(常用的小技术点收集)