android Dialog 关于hide or dismiss的问题

Question

1. 什么是hide？

2. 什么是dismiss

3. 到底该如何选择？

个人理解：

hide()

Hide the dialog, but do not dismiss it.--官方文档

dismiss()

Dismiss this dialog, removing it from the screen.--官方文档

show()

Start the dialog and display it on screen.--官方文档

^~^

如果Dialog使用不频繁的话，就dismiss()吧.
因为如果使用hide()，而忘记在finish()没有dismiss(),有可能会报错窗口泄露哦。

……

Answer 1

hide的意思是把view设置成不可见，但还是在根view的子节点上
dismiss的意思是直接把view从根view的子节点上移除，资源会全部释放掉
//hide
public void hide() {

    if (mDecor != null) {
        mDecor.setVisibility(View.GONE);
    }
}

// dismiss
void dismissDialog() {

    if (mDecor == null || !mShowing) {
        return;
    }

    if (mWindow.isDestroyed()) {
        Log.e(TAG, "Tried to dismissDialog() but the Dialog's window was already destroyed!");
        return;
    }

    try {
        mWindowManager.removeViewImmediate(mDecor);
    } finally {
        if (mActionMode != null) {
            mActionMode.finish();
        }
        mDecor = null;
        mWindow.closeAllPanels();
        onStop();
        mShowing = false;

        sendDismissMessage();
    }
}