Android ActivityNotFoundException意图+;小装置
我正在尝试创建一个小部件,每当我按下save按钮并从editText获取信息时,它都会更新文本。当我按下按钮以意图发送变量时,它会在logcat中抛出“android.content.ActivityNotFoundException:找不到显式活动类”。这是我的代码: Main.classAndroid ActivityNotFoundException意图+;小装置,android,android-intent,android-widget,Android,Android Intent,Android Widget,我正在尝试创建一个小部件,每当我按下save按钮并从editText获取信息时,它都会更新文本。当我按下按钮以意图发送变量时,它会在logcat中抛出“android.content.ActivityNotFoundException:找不到显式活动类”。这是我的代码: Main.class public class MainActivity extends AppCompatActivity { Button save; EditText Nom; EditText C
public class MainActivity extends AppCompatActivity {
Button save;
EditText Nom;
EditText Cognom;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
save = (Button) findViewById(R.id.save);
Nom = (EditText) findViewById(R.id.editTextNom);
Cognom = (EditText) findViewById(R.id.editTextCognom);
save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i;
i = new Intent(MainActivity.this, NewAppWidget.class);
i.putExtra("NOM",Nom.getText().toString());
i.putExtra("COGNOM",Cognom.getText().toString());
startActivity(i);
}
});
}
}
public class NewAppWidget extends AppWidgetProvider {
static Intent intent = new Intent();
static String nom = intent.getExtras().getString("NOM");
static String cognom = intent.getExtras().getString("COGNOM");
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
CharSequence widgetText = context.getString(R.string.appwidget_text);
// Construct the RemoteViews object
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.new_app_widget);
views.setTextViewText(R.id.TextViewNom, nom);
views.setTextViewText(R.id.TextViewCognom, cognom);
// Instruct the widget manager to update the widget
appWidgetManager.updateAppWidget(appWidgetId, views);
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
@Override
public void onEnabled(Context context) {
// Enter relevant functionality for when the first widget is created
}
@Override
public void onDisabled(Context context) {
// Enter relevant functionality for when the last widget is disabled
}
}
WidgetClass
public class MainActivity extends AppCompatActivity {
Button save;
EditText Nom;
EditText Cognom;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
save = (Button) findViewById(R.id.save);
Nom = (EditText) findViewById(R.id.editTextNom);
Cognom = (EditText) findViewById(R.id.editTextCognom);
save.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i;
i = new Intent(MainActivity.this, NewAppWidget.class);
i.putExtra("NOM",Nom.getText().toString());
i.putExtra("COGNOM",Cognom.getText().toString());
startActivity(i);
}
});
}
}
public class NewAppWidget extends AppWidgetProvider {
static Intent intent = new Intent();
static String nom = intent.getExtras().getString("NOM");
static String cognom = intent.getExtras().getString("COGNOM");
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId) {
CharSequence widgetText = context.getString(R.string.appwidget_text);
// Construct the RemoteViews object
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.new_app_widget);
views.setTextViewText(R.id.TextViewNom, nom);
views.setTextViewText(R.id.TextViewCognom, cognom);
// Instruct the widget manager to update the widget
appWidgetManager.updateAppWidget(appWidgetId, views);
}
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// There may be multiple widgets active, so update all of them
for (int appWidgetId : appWidgetIds) {
updateAppWidget(context, appWidgetManager, appWidgetId);
}
}
@Override
public void onEnabled(Context context) {
// Enter relevant functionality for when the first widget is created
}
@Override
public void onDisabled(Context context) {
// Enter relevant functionality for when the last widget is disabled
}
}
清单:
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".NewAppWidget">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/new_app_widget_info" />
</receiver>
</application>
错误:
android.content.ActivityNotFoundException:找不到显式活动类
AppWidgetProvider
扩展BroadcastReceiver
非活动
要使用startActivity
您需要提供Activity类的子对象
NewAppWidget
不是活动
AppWidgetProvider
扩展BroadcastReceiver
非活动
要使用startActivity
您需要提供Activity类的子对象
NewAppWidget
不是活动 老兄,首先,你不能像启动活动那样启动小部件提供商
如果您想从活动中更新小部件,可以这样做
Intent intent = new Intent(this, MyAppWidgetProvider.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
// Use an array and EXTRA_APPWIDGET_IDS instead of AppWidgetManager.EXTRA_APPWIDGET_ID,
// since it seems the onUpdate() is only fired on that:
int[] ids = AppWidgetManager.getInstance(getApplication())
.getAppWidgetIds(new ComponentName(getApplication(), MyAppWidgetProvider.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids);
sendBroadcast(intent);
您可以将参数传递到此目的,或者更好地将值保存在中,并在onUpdate方法中的小部件提供程序类中使用它
我读过你的widgetprovider类,你在使用这个类时会遇到很多错误。为了理解android小部件,您可以分叉并理解这一点
在本示例中,您将了解如何更新小部件、如何拥有多个小部件控件以及更多内容。因此,我强烈建议您仔细阅读此示例。Dude首先,您不能像启动活动一样启动小部件提供商 如果您想从活动中更新小部件,可以这样做
Intent intent = new Intent(this, MyAppWidgetProvider.class);
intent.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
// Use an array and EXTRA_APPWIDGET_IDS instead of AppWidgetManager.EXTRA_APPWIDGET_ID,
// since it seems the onUpdate() is only fired on that:
int[] ids = AppWidgetManager.getInstance(getApplication())
.getAppWidgetIds(new ComponentName(getApplication(), MyAppWidgetProvider.class));
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids);
sendBroadcast(intent);
您可以将参数传递到此目的,或者更好地将值保存在中,并在onUpdate方法中的小部件提供程序类中使用它
我读过你的widgetprovider类,你在使用这个类时会遇到很多错误。为了理解android小部件,您可以分叉并理解这一点
在本示例中,您将了解如何更新小部件、如何拥有多个小部件控件以及更多内容。因此,我强烈建议您仔细阅读此示例。您能告诉我实现我想要的功能的正确方法吗?提前谢谢。您的问题不清楚。只需将值传递给下一个活动。为什么需要为其创建小部件@Antonioor如果你想要一个自定义小部件..只需创建它并将数据传递给它..在相同的活动本身..我只想使用editText值编辑小部件并更新它。你能告诉我实现我想要的东西的正确方法吗?提前谢谢。您的问题不清楚。只需将值传递给下一个活动。为什么需要为其创建小部件@Antonioor如果你想要一个自定义小部件..只需创建它并将数据传递给它..在相同的活动本身..我只想使用editText值编辑小部件并更新它。谢谢你的回答,我会尝试它。谢谢你的回答,我会尝试它。