Dialog相关

DialogFragment显示回调：
onCreate-->onCreateDialog-->onCreateView-->onViewCreated-->onResume
Google推荐使用DialogFragment
Activity销毁重建DialogFragment会自动重建，而Dialog不会。（横竖屏切换）

自定义Dialog(android.app.Dialog)

public class PermissionRequestDialog extends Dialog {
    private View.OnClickListener allowListener;
    private View.OnClickListener refuseListener;
    private Context mContext;
    private String title;
    private String message;
    private String allowName;
    private String refuseName;

    public PermissionRequestDialog(@NonNull Context context) {
        this(context, R.style.Dialog);
    }

    public PermissionRequestDialog(@NonNull Context context, int themeResId) {
        super(context, themeResId);
        mContext = context;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog_permission_request);
        Window window = getWindow();
        if (window != null) {
            Log.d(TAG, "onCreate: ");
            LayoutParams lp = window.getAttributes();
            lp.width = MATCH_PARENT;
            lp.height = MATCH_PARENT;
            window.setAttributes(lp);
            window.getDecorView().setPadding(0, 0, 0, 0);
            window.setGravity(Gravity.CENTER);
        }
        TextView tvMsg = findViewById(R.id.tvMsg);
        if (message != null) {
            tvMsg.setText(message);
        }
        TextView tvTitle = findViewById(R.id.tvTitle);
        if (title != null) {
            tvTitle.setText(title);
        }
        TextView tvRefuse = findViewById(R.id.tvRefuse);
        if (refuseName != null) {
            tvRefuse.setText(refuseName);
        }
        tvRefuse.setOnClickListener(v -> {
            if (refuseListener != null) {
                refuseListener.onClick(v);
            }
            dismiss();
        });
        TextView tvAllow = findViewById(R.id.tvAllow);
        if (allowName != null) {
            tvAllow.setText(allowName);
        }
        tvAllow.setOnClickListener(v -> {
            if (allowListener != null) {
                allowListener.onClick(v);
            }
            dismiss();
        });

        float sScale = mContext.getResources().getDisplayMetrics().density;
        int widthPx = mContext.getResources().getDisplayMetrics().widthPixels;
        int heightPx = mContext.getResources().getDisplayMetrics().heightPixels;
        LinearLayout dialogConstraint = findViewById(R.id.dialogConstraint);
        ViewGroup.LayoutParams params = dialogConstraint.getLayoutParams();
        if (params != null) {
            int widthDp = (int) (widthPx / sScale);
            int heightDp = (int) (heightPx / sScale);
            int widthPxDialog;
            if (widthPx > heightPx) {
                // 横版
                if (widthDp > 360) {
                    // 过大用260
                    widthPxDialog = (int) (360 * sScale);
                } else {
                    // 宽度达不到360-->很少遇到
                    widthPxDialog = (int) ((widthDp - 20) * sScale);
                }
            } else {
                // 竖版
                if (widthDp > 360) {
                    // 一般平板
                    widthPxDialog = (int) (360 * sScale);
                } else {
                    // 一般手机
                    widthPxDialog = (int) ((widthDp - 60) * sScale);
                }
            }
            Log.d(TAG, "onCreate: sScale:" + sScale + " widthPx:" + widthPx + " heightPx:" + heightPx +
                    " widthDp:" + widthDp + " heightDp:" + heightDp + " widthDialog:" + widthPxDialog);
            params.width = widthPxDialog;
            dialogConstraint.setLayoutParams(params);
        }
        setCancelable(false);
    }

    public PermissionRequestDialog setMessage(String message) {
        if (message != null) {
            this.message = message;
        }
        return this;
    }

    public PermissionRequestDialog setMessage(List<String> tips) {
        if (tips != null && !tips.isEmpty()) {
            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < tips.size(); i++) {
                if (i == tips.size() - 1) {
                    builder.append(tips.get(i));
                } else {
                    builder.append(tips.get(i)).append("\n");
                }
            }
            this.message = builder.toString();
        }
        return this;
    }

    public PermissionRequestDialog setTitle(String title) {
        this.title = title;
        return this;
    }

    public PermissionRequestDialog setAllowListener(View.OnClickListener allowListener) {
        this.allowListener = allowListener;
        return this;
    }

    public PermissionRequestDialog setAllowListener(String name, View.OnClickListener allowListener) {
        allowName = name;
        this.allowListener = allowListener;
        return this;
    }

    public PermissionRequestDialog setRefuseListener(View.OnClickListener refuseListener) {
        this.refuseListener = refuseListener;
        return this;
    }

    public PermissionRequestDialog setRefuseListener(String name,View.OnClickListener refuseListener) {
        refuseName = name;
        this.refuseListener = refuseListener;
        return this;
    }

    @Override
    public void show() {
        Log.d(TAG, "show: ");
        Window window = getWindow();
        if (window != null) {
            window.setFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
            View decor = window.getDecorView();
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
            } else {
                decor.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
            }
            super.show();
            window.clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
        } else {
            super.show();
        }
    }
}

样式：

   <style name="Dialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowBackground">#00000000</item>
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowIsTranslucent">false</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:background">@null</item>
        <item name="android:backgroundDimEnabled">true</item>
    </style>

注意点：Dialog的布局Window->DecorView-->FrameLayout-->xml布局
为什么系统dialog不充满全屏
充满全屏：
LayoutParams lp = window.getAttributes();
lp.width = MATCH_PARENT;
lp.height = MATCH_PARENT;
window.setAttributes(lp);
控制paddiing：
window.getDecorView().setPadding(0, 0, 0, 0);
重写show方法：防止底部导航隐藏闪烁(如华为手机等)