共享首选项上的空指针

时间：2015-01-03 04:14:43

标签： android sharedpreferences

我正在实施共享偏好设置，并且我想要显示以前保存的内容。为此，即使使用null首选项文件，我也试图设置编辑框文本。 我不确定是否可能。

public class PerfilActivity extends Activity {

    public static final String PERFIL_FILE = "MyPreferencesFile";

    private Button btn_historico, btn_actualiza;
    private EditText ed_nome, ed_altura, ed_peso, ed_gordura;
    private SharedPreferences settings;
    private SharedPreferences.Editor editor;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_perfil);



        btn_actualiza = (Button)findViewById(id.btn_atualizar);
        btn_historico = (Button)findViewById(id.btn_verHistorico);
        ed_nome = (EditText)findViewById(id.ed_nome);
        ed_altura = (EditText)findViewById(id.ed_altura);
        ed_peso = (EditText)findViewById(id.ed_peso);
        ed_gordura = (EditText)findViewById(id.ed_gorduraCorporal);


        ed_nome.setText(settings.getString("nome", "(Insira o nome)"));
        ed_altura.setText(settings.getInt("altura", 1232));
        ed_peso.setText(settings.getInt("peso", 222));
        ed_gordura.setText(settings.getInt("gordura", 123));

        btn_actualiza.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                settings = getSharedPreferences(PERFIL_FILE, 0);
                editor = settings.edit();
                editor.putString("nome", ed_nome.getText().toString());
                editor.putInt("altura", Integer.parseInt(ed_altura.getText().toString()));
                editor.putInt("peso", Integer.parseInt(ed_peso.getText().toString()));
                editor.putInt("gordura", Integer.parseInt(ed_gordura.getText().toString()));
                showToast("Valores actualizados com sucesso!", 1);
                editor.commit();
            }
        });
    }
}

logcat的

01-03 04:06:24.505: E/AndroidRuntime(31419): FATAL EXCEPTION: main
01-03 04:06:24.505: E/AndroidRuntime(31419): Process: com.AMOV.mr.fit, PID: 31419
01-03 04:06:24.505: E/AndroidRuntime(31419): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.AMOV.mr.fit/com.AMOV.mr.fit.PerfilActivity}: android.content.res.Resources$NotFoundException: String resource ID #0x7b
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2212)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.app.ActivityThread.startActivityNow(ActivityThread.java:2045)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:749)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.widget.TabHost.setCurrentTab(TabHost.java:413)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:154)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:549)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.view.View.performClick(View.java:4445)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.view.View$PerformClick.run(View.java:18446)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.os.Handler.handleCallback(Handler.java:733)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.os.Handler.dispatchMessage(Handler.java:95)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.os.Looper.loop(Looper.java:136)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.app.ActivityThread.main(ActivityThread.java:5146)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at java.lang.reflect.Method.invokeNative(Native Method)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at java.lang.reflect.Method.invoke(Method.java:515)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at dalvik.system.NativeStart.main(Native Method)
01-03 04:06:24.505: E/AndroidRuntime(31419): Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x7b
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.content.res.Resources.getText(Resources.java:265)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.widget.TextView.setText(TextView.java:3888)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at com.AMOV.mr.fit.PerfilActivity.onCreate(PerfilActivity.java:39)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.app.Activity.performCreate(Activity.java:5231)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
01-03 04:06:24.505: E/AndroidRuntime(31419):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)


01-03 04:06:24.495: E/ActivityThread(31419): Failed to find resource
01-03 04:06:24.495: E/ActivityThread(31419): android.content.res.Resources$NotFoundException: String resource ID #0x7b
01-03 04:06:24.495: E/ActivityThread(31419):    at android.content.res.Resources.getText(Resources.java:265)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.widget.TextView.setText(TextView.java:3888)
01-03 04:06:24.495: E/ActivityThread(31419):    at com.AMOV.mr.fit.PerfilActivity.onCreate(PerfilActivity.java:39)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.app.Activity.performCreate(Activity.java:5231)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.app.ActivityThread.startActivityNow(ActivityThread.java:2045)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:749)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.widget.TabHost.setCurrentTab(TabHost.java:413)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:154)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:549)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.view.View.performClick(View.java:4445)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.view.View$PerformClick.run(View.java:18446)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.os.Handler.handleCallback(Handler.java:733)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.os.Handler.dispatchMessage(Handler.java:95)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.os.Looper.loop(Looper.java:136)
01-03 04:06:24.495: E/ActivityThread(31419):    at android.app.ActivityThread.main(ActivityThread.java:5146)
01-03 04:06:24.495: E/ActivityThread(31419):    at java.lang.reflect.Method.invokeNative(Native Method)
01-03 04:06:24.495: E/ActivityThread(31419):    at java.lang.reflect.Method.invoke(Method.java:515)
01-03 04:06:24.495: E/ActivityThread(31419):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
01-03 04:06:24.495: E/ActivityThread(31419):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
01-03 04:06:24.495: E/ActivityThread(31419):    at dalvik.system.NativeStart.main(Native Method)

2 个答案:

答案 0 :(得分：2)

  

Resources $ NotFoundException：字符串资源ID＃0x7b

因为您正在将Integer传递给EditText.setText方法。使用String.valueOf(<Int value>)在EditTexts中显示值：

 ed_altura.setText(String.valueOf(settings.getInt("altura", 1232)));
 ed_peso.setText(String.valueOf(settings.getInt("peso", 222)));
 ed_gordura.setText(String.valueOf(settings.getInt("gordura", 123)));

答案 1 :(得分：2)

在设置为EditText之前，必须解析值，因为值必须为字符串类型 

ed_altura.setText(settings.getInt("altura", 1232));
        ed_peso.setText(settings.getInt("peso", 222));
        ed_gordura.setText(settings.getInt("gordura", 123));

替换为 

 ed_altura.setText(String.valueOf(settings.getInt("altura", 1232)));
 ed_peso.setText(String.valueOf(settings.getInt("peso", 222)));
 ed_gordura.setText(String.valueOf(settings.getInt("gordura", 123)));

检查一下它可能会帮助你

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