SharedPreferenceUtil

public class SharedPreferenceUtil {

    private static SharedPreferences getAppSp() {
        return App.getInstance().getSharedPreferences(SHAREDPREFERENCES_NAME, Context.MODE_PRIVATE);
    }
    
    //其他类型类推
    public static boolean getFirstLoad() {
        return getAppSp().getBoolean(FIRST_LOAD, DEFAULT_FIRST_LOAD);
    }

    public static void setFirstLoad(boolean state) {
        getAppSp().edit().putBoolean(FIRST_LOAD, state).apply();
    }
}

BottomDialogUtil底部弹窗

public class BottomDialogUtil {
    private static Dialog bottomDialog;

    public static View showBottomDialog(Context context, int layout) {
        bottomDialog = new Dialog(context, R.style.BottomDialog);
        View contentView = LayoutInflater.from(context).inflate(layout, null);
        bottomDialog.setContentView(contentView);
        ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) contentView.getLayoutParams();
        layoutParams.width = DeviceUtil.getScreenWidth(context) - DeviceUtil.dp2px(context, 16f);
        layoutParams.bottomMargin = DeviceUtil.dp2px(context, 8f);
        contentView.setLayoutParams(layoutParams);
        bottomDialog.getWindow().setGravity(Gravity.BOTTOM);
        bottomDialog.getWindow().setWindowAnimations(R.style.BottomDialog_Animation);
        bottomDialog.setCanceledOnTouchOutside(true);
        bottomDialog.show();
        return contentView;
    }

    public static void dismissBottomDialog() {
        bottomDialog.dismiss();
    }
}

<style name="BottomDialog" parent="@style/Base.V7.Theme.AppCompat.Light.Dialog">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
</style>

<style name="BottomDialog.Animation" parent="Animation.AppCompat.Dialog">
    <item name="android:windowEnterAnimation">@anim/translate_dialog_in</item>
    <item name="android:windowExitAnimation">@anim/translate_dialog_out</item>
</style>

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="100"
    android:fromXDelta="0"
    android:fromYDelta="100%"
    android:toXDelta="0"
    android:toYDelta="0">
</translate>

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="100"
    android:fromXDelta="0"
    android:fromYDelta="0"
    android:toXDelta="0"
    android:toYDelta="100%">
</translate>

软键盘切换

public class KeyBoardUtil {
    public static void showKeyboard(Context mContext, EditText mEditText) {
        InputMethodManager imm = (InputMethodManager) mContext
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        if (imm != null) {
            imm.showSoftInput(mEditText, InputMethodManager.SHOW_FORCED);
        }
    }

    public static void hideKeyboard(Context mContext, EditText mEditText) {
        InputMethodManager imm = (InputMethodManager) mContext
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        if (imm != null) {
            imm.hideSoftInputFromWindow(mEditText.getWindowToken(),
                    InputMethodManager.HIDE_NOT_ALWAYS);
        }

    }

    public static void toggleKeyboard(Context mContext) {
        InputMethodManager imm = (InputMethodManager) mContext
                .getSystemService(Context.INPUT_METHOD_SERVICE);
        if (imm != null) {
            imm.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT,
                    InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }
}