GUI开发，屏蔽输入法影响 {#gui开发屏蔽输入法影响}

public class WindowsImManager {

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-type">boolean</span> <span class="hljs-variable">status</span> <span class="hljs-operator">=</span> <span class="hljs-literal">true</span>;

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">native</span> WinNT.HANDLE <span class="hljs-title function_">ImmGetContext</span><span class="hljs-params">(WinDef.HWND hwnd)</span>;

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">native</span> WinNT.HANDLE <span class="hljs-title function_">ImmAssociateContext</span><span class="hljs-params">(WinDef.HWND hwnd, WinNT.HANDLE himc)</span>;

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">native</span> <span class="hljs-type">boolean</span> <span class="hljs-title function_">ImmReleaseContext</span><span class="hljs-params">(WinDef.HWND hwnd, WinNT.HANDLE himc)</span>;

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">native</span> WinNT.HANDLE <span class="hljs-title function_">ImmCreateContext</span><span class="hljs-params">()</span>;

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">native</span> <span class="hljs-type">boolean</span> <span class="hljs-title function_">ImmDestroyContext</span><span class="hljs-params">(WinNT.HANDLE himc)</span>;

    <span class="hljs-keyword">static</span> {
        Native.register(<span class="hljs-string">"imm32"</span>);
    }

    <span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">final</span> <span class="hljs-type">User32</span> <span class="hljs-variable">u</span> <span class="hljs-operator">=</span> User32.INSTANCE;

    <span class="hljs-comment">/**
     * 打开输入法
     */</span>
    <span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">makeOn</span><span class="hljs-params">()</span> {
        <span class="hljs-keyword">if</span> (status) {
            <span class="hljs-keyword">return</span>;
        }
        status = <span class="hljs-literal">true</span>;
        WinDef.<span class="hljs-type">HWND</span> <span class="hljs-variable">hwnd</span> <span class="hljs-operator">=</span> u.GetForegroundWindow();
        WinNT.<span class="hljs-type">HANDLE</span> <span class="hljs-variable">himc</span> <span class="hljs-operator">=</span> ImmGetContext(hwnd);
        <span class="hljs-keyword">if</span> (himc == <span class="hljs-literal">null</span>) {
            himc = ImmCreateContext();
            ImmAssociateContext(hwnd, himc);
        }
        ImmReleaseContext(hwnd, himc);
    }

    <span class="hljs-comment">/**
     * 关闭输入法
     */</span>
    <span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title function_">makeOff</span><span class="hljs-params">()</span> {
        <span class="hljs-keyword">if</span> (!status) {
            <span class="hljs-keyword">return</span>;
        }
        status = <span class="hljs-literal">false</span>;
        WinDef.<span class="hljs-type">HWND</span> <span class="hljs-variable">hwnd</span> <span class="hljs-operator">=</span> u.GetForegroundWindow();
        WinNT.<span class="hljs-type">HANDLE</span> <span class="hljs-variable">himc</span> <span class="hljs-operator">=</span> ImmAssociateContext(hwnd, <span class="hljs-literal">null</span>);
        <span class="hljs-keyword">if</span> (himc != <span class="hljs-literal">null</span>) {
            ImmDestroyContext(himc);
        }
        ImmReleaseContext(hwnd, himc);
    }



`}
`