[安卓开发] 完美解决Dialog不能全屏

为什么布局设置了match_parent还是不能全屏呢？

看dialog的show的源码:

public void show() {
        if (mShowing) {
            if (mDecor != null) {
                if (mWindow.hasFeature(Window.FEATURE_ACTION_BAR)) {
                    mWindow.invalidatePanelMenu(Window.FEATURE_ACTION_BAR);
                }
                mDecor.setVisibility(View.VISIBLE);
            }
            return;
        }

        mCanceled = false;

        if (!mCreated) {
            dispatchOnCreate(null);
        }

        onStart();
        mDecor = mWindow.getDecorView();

        if (mActionBar == null && mWindow.hasFeature(Window.FEATURE_ACTION_BAR)) {
            final ApplicationInfo info = mContext.getApplicationInfo();
            mWindow.setDefaultIcon(info.icon);
            mWindow.setDefaultLogo(info.logo);
            mActionBar = new WindowDecorActionBar(this);
        }

        WindowManager.LayoutParams l = mWindow.getAttributes();
        if ((l.softInputMode
                & WindowManager.LayoutParams.SOFT_INPUT_IS_FORWARD_NAVIGATION) == 0) {
            WindowManager.LayoutParams nl = new WindowManager.LayoutParams();
            nl.copyFrom(l);
            nl.softInputMode |=
                    WindowManager.LayoutParams.SOFT_INPUT_IS_FORWARD_NAVIGATION;
            l = nl;
        }

        try {
            mWindowManager.addView(mDecor, l);
            mShowing = true;

            sendShowMessage();
        } finally {
        }
    }

可以看出，大小在show的时候设置的。在show之前，即使动态改变这个layoutParams，也是不行的。

解决方法1：

首先style:

dilaog里面的setContentView下面

getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);

方法二

dialog里面重写show()

    @Override
    public void show() {
        super.show();
        LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) view.getLayoutParams();
        DisplayMetrics dm = new DisplayMetrics();
        WindowManager manager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
        manager.getDefaultDisplay().getMetrics(dm);
        layoutParams.width = dm.widthPixels;
        layoutParams.height = dm.heightPixels;
        view.setLayoutParams(layoutParams);
    }