android - 扩展 LockPatternActivity 时出错

Question

在我的应用程序中，我想扩展 LockPatternActivity 库类:

https://code.google.com/p/android-lockpattern/

import com.haibison.android.lockpattern.LockPatternActivity;
import com.haibison.android.lockpattern.R;
import com.haibison.android.lockpattern.*;
public class ExtendPatternActivity extends LockPatternActivity{

}

使用lockpattern的类:

   public class PatternSetter extends Activity{


Context context = this;
final int REQ_CREATE_PATTERN = 1;


@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    this.setContentView(R.layout.pattern_setter);

     Settings.Security.setAutoSavePattern(this, true);

 Intent intent = new Intent(LockPatternActivity.ACTION_CREATE_PATTERN, null, this, ExtendPatternActivity.class);
     this.startActivityForResult(intent, REQ_CREATE_PATTERN);



}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
    case REQ_CREATE_PATTERN: {
        if (resultCode == RESULT_OK) {
            char[] pattern = data.getCharArrayExtra(
                    LockPatternActivity.EXTRA_PATTERN);
                    Intent intent = new Intent(context, MainTheftActivity.class);
                    context.startActivity(intent);


}

但是这个错误错误:

04-18 20:37:32.597: E/AndroidRuntime(14712): java.lang.RuntimeException: Unable to start  
activity ComponentInfo{com.tndev.theftahead/com.tndev.theftahead.ExtendPatternActivity}:  
android.view.InflateException: Binary XML file line #18: Error inflating class 
com.haibison.android.lockpattern.widget.LockPatternView_v14
....
04-18 20:37:32.597: E/AndroidRuntime(14712): Caused by:  
android.content.res.Resources$NotFoundException: Resource ID #0x0
04-18 20:37:32.597: E/AndroidRuntime(14712):    at  
android.content.res.Resources.getValue(Resources.java:1163)
04-18 20:37:32.597: E/AndroidRuntime(14712):    at   
android.content.res.Resources.getColor(Resources.java:845)
04-18 20:37:32.597: E/AndroidRuntime(14712):    at  
com.haibison.android.lockpattern.widget.LockPatternView.<init>(LockPatternView.java:405)
04-18 20:37:32.597: E/AndroidRuntime(14712):    at   
com.haibison.android.lockpattern.widget.LockPatternView_v14.<init>(LockPatternView_v14.java:42)

似乎ExtendPatternActivity 无法正确加载lockpattern 库中的资源？我应该如何将库中的资源加载到我的应用程序中？非常感谢..

Answer 1

首先，如果你想使用资源文件，你应该把这个库作为一个Android库项目来使用。右键单击 eclipse 中的项目，在“Android”属性下，将“Is library”设置为 true。

然后，在您的应用程序项目中，将库项目添加到引用中。