android - Android启动画面和密码

我正在尝试添加一个密码（我没有使用alertDialog来添加它）和一个启动画面（这是我的问题），密码在询问时起作用，但是在此之前，我得到了启动画面崩溃的原因，但它没有起作用。

我为启动画面制作了一个XML文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android">
<ImageView android:id="@+id/splashscreen"
android:layout_gravity="center"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:src="@drawable/untitled">
</ImageView></LinearLayout>

当我尝试添加命令以在主程序中获取启动画面时

  AlertDialog.Builder alert = new AlertDialog.Builder(this);
    alert.setTitle("Login");
    alert.setMessage("Enter Pin :");
    alert.setCancelable(false);

    setContentView(R.layout.splashscreen);

     // Set an EditText view to get user input
     final EditText input = new EditText(this);
     alert.setView(input);

        alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            String value = input.getText().toString();
            String compar = "123456";
                if(value.equals(compar))
                {
                    Log.d( TAG, "Pin Value : " + value);
                   copiezmView.setVisibility(View.VISIBLE);
                }
                else
                {
                    Toast.makeText(getApplicationContext(), "Acces Denied", Toast.LENGTH_SHORT).show();
                    alerta();
                }

我崩溃了

java.lang.RuntimeException: Unable to start activity ComponentInfo{///////}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'

那我在做什么错？初始屏幕的目的是，我想位于AlertDialog的后面，位于后面的前面，因此用户如果不知道密码就看不到后面的内容（我对setView进行过处理，但仅适用于linearLayout而不是在PrefferenceScreen上

完整的logCat

04-12 13:09:49.734: E/AndroidRuntime(1731): FATAL EXCEPTION: main
04-12 13:09:49.734: E/AndroidRuntime(1731): java.lang.RuntimeException: Unable to start     activity ComponentInfo{com.zegoggles.smssync/com.zegoggles.smssync.SmsSync}:    java.lang.RuntimeException: Your content must have a ListView whose id attribute is   'android.R.id.list'
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.os.Looper.loop(Looper.java:137)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.app.ActivityThread.main(ActivityThread.java:5039)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at java.lang.reflect.Method.invokeNative(Native Method)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at    java.lang.reflect.Method.invoke(Method.java:511)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at dalvik.system.NativeStart.main(Native Method)
04-12 13:09:49.734: E/AndroidRuntime(1731): Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.app.ListActivity.onContentChanged(ListActivity.java:243)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.preference.PreferenceActivity.onContentChanged(PreferenceActivity.java:959)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:273)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.app.Activity.setContentView(Activity.java:1881)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at com.zegoggles.smssync.SmsSync.alerta(SmsSync.java:132)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at com.zegoggles.smssync.SmsSync.onCreate(SmsSync.java:118)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at android.app.Activity.performCreate(Activity.java:5104)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at     android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
04-12 13:09:49.734: E/AndroidRuntime(1731):     at       android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
04-12 13:09:49.734: E/AndroidRuntime(1731):     ... 11 more

最佳答案

我可以从1行崩溃输出中看出，您正在使用ListActivity。并且您没有给ListView id作为@android:id/list。

给listview id作为

android:id="@android:id/list"

您的问题将得到解决。希望能帮助到你。

关于android - Android启动画面和密码，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15971642/