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:
<RadioButton
android:id="@+id/contentfragment_rbtn_home"
style="@style/RadioButtonStyle"
android:layout_marginTop="5dp"
android:drawableLeft="@drawable/selected_home_btn_bg"
android:drawablePadding="10dp"
android:text="@string/map_page"
android:textColor="@color/color_black" />
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:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/switch_bg_disabled_emui" android:state_enabled="false"/>
<item android:drawable="@drawable/switch_bg_on_emui" android:state_pressed="true"/>
<item android:drawable="@drawable/switch_bg_on_emui" android:state_focused="true"/>
<item android:drawable="@drawable/switch_bg_on_emui" android:state_checked="true"/>
<item android:drawable="@drawable/switch_bg_off_emui"/>
</selector>
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;
}
}
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