小记，底部弹出自定义布局的Dialog 虚拟按键阻挡问题

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• GitHub: @Ricco
  最近开发的项目，用到了Dialog，要求是底部弹出，完全没有问题，这很简单，但是当拿出Android studio的虚拟机[Galaxy Nexus API 25]测试的时候，发现，底部的虚拟按键会阻挡Dialog自己定义的布局，简单的实现一下。

ps：我现在分享的项目代码并没有完美解决，需要配合Activity的布局才能实现。

先上代码

DialogUtil.class 用于隐藏高版本的新手机的虚拟按键

public class DialogUtil {
    public static Window getDialogWindow(Context context, Dialog mDialog) {
        final Window dialogWindow = mDialog.getWindow();

        if (checkDeviceHasNavigationBar(context)) {
            //存在的时候设置
            dialogWindow.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
            dialogWindow.getDecorView().setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
                @Override
                public void onSystemUiVisibilityChange(int visibility) {
                    int uiOptions =
                            View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
                                    // 布局位于状态栏下方
                                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                                    // 全屏
                                    // View.SYSTEM_UI_FLAG_FULLSCREEN |
                                    // 隐藏导航栏
                                    View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
                    if (Build.VERSION.SDK_INT >= 19) {
                        uiOptions |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
                    } else {
                        uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
                    }
                    dialogWindow.getDecorView().setSystemUiVisibility(uiOptions);
                }
            });
        }
        dialogWindow.setGravity(Gravity.BOTTOM);
        dialogWindow.setWindowAnimations(R.style.DialogStyle);

        return dialogWindow;
    }

    //判断是否有虚拟按键
    private static boolean checkDeviceHasNavigationBar(Context context) {
        boolean hasNavigationBar = false;
        Resources rs = context.getResources();
        int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");
        if (id > 0) {
            hasNavigationBar = rs.getBoolean(id);
        }
        try {
            Class systemPropertiesClass = Class.forName("android.os.SystemProperties");
            Method m = systemPropertiesClass.getMethod("get", String.class);
            String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");
            if ("1".equals(navBarOverride)) {
                hasNavigationBar = false;
            } else if ("0".equals(navBarOverride)) {
                hasNavigationBar = true;
            }
        } catch (Exception e) {
        }
        return hasNavigationBar;
    }
}

---

MainActivity.class

private Dialog mDialog;

private void showDialog() {
     mDialog= new Dialog(this, R.style.MyDialog);
     LinearLayout root = (LinearLayout) LayoutInflater.from(this).inflate(R.layout.dialog, null);
     // 取消
     root.findViewById(R.id.iv_dialog_cancel).setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
             mDialog.cancel();
         }
     });
     // 确定
     root.findViewById(R.id.tv_dialog_ok).setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
              // 逻辑
              mDialog.cancel();
          }
     });
     // 其他代码...
     mDialog.setContentView(root);
     Window dialogWindow = DialogUtil.getDialogWindow(this, mDialog);
     WindowManager.LayoutParams lp = dialogWindow.getAttributes();
     lp.x = 0;
     lp.y = -20;
     lp.width = getResources().getDisplayMetrics().widthPixels;
     root.measure(0, 0);
     lp.height = root.getMeasuredHeight();
     dialogWindow.setAttributes(lp);
     mDialog.show();
}

---

res/values/styles.xml

res/anim/dialog_enter.xml

res/anim/dialog_exit.xml