在你的Activity的onCreate函數中添加如下代碼即可完全禁用軟鍵盤：

getWindow().setFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM,
                WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);

所以,你想全局生效的話,可以寫一個基類,例如:

public abstract class BaseNoIMActivity extends AppCompatActivity {
    @Override
    protected void
 
 onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM,
                WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
        onCreateStarted(savedInstanceState);
    }

    protected
 
 abstract void onCreateStarted(@Nullable Bundle savedInstanceState);
}

然後任意個Activity都繼承它,如果你的項目已經有基類,那麽把上面的代碼插入到基類中即可,demo示例:

public class TestActivity extends BaseNoIMActivity {//繼承基類

    @Override
    protected void onCreateStarted(@Nullable Bundle savedInstanceState) {
        setContentView(R.layout.activity_test);
        Log.e(
 
"test","TestActivity is started");
    }
}

引用自：https://segmentfault.com/q/1010000008489927/a-1020000008490261/revision

安卓應用如何在整個應用運行期間都禁止彈出輸入法面板？