Android 活动赢得';t打开
我有一个按钮,可以在Android中打开一个新的活动,但它什么也不做 第一个活动的Java:Android 活动赢得';t打开,android,android-intent,android-manifest,Android,Android Intent,Android Manifest,我有一个按钮,可以在Android中打开一个新的活动,但它什么也不做 第一个活动的Java: public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.lists); } @Override public void onConfigurationChanged(Configuration n
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.lists);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// ignore orientation/keyboard change
super.onConfigurationChanged(newConfig);
ListView listsList = (ListView) findViewById(R.id.lists);
Button newList = (Button) findViewById(R.id.newlistbutton);
newList.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent myIntent = new Intent(v.getContext(), NewWishList.class);
startActivity(myIntent);
}
});
}
}
public class NewWishList extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.newlist);
Button back = (Button) findViewById(R.id.backbutton);
back.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent(view.getContext(), ListOfLists.class);
startActivity(intent);
}
});
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// ignore orientation/keyboard change
super.onConfigurationChanged(newConfig);
RadioGroup option = (RadioGroup) findViewById(R.id.radioGroup1);
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.wish.list"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="7" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-feature android:name="android.hardware.screen.portrait"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.Black.NoTitleBar">
<activity
android:name="com.wish.list.FacebookSignIn"
android:label="@string/app_name"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait" >
<intent-filter>
<action
android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ListOfLists"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait"
></activity>
<activity
android:name=".NewWishList"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait"
></activity>
</application>
</manifest>
第二个活动的Java:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.lists);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// ignore orientation/keyboard change
super.onConfigurationChanged(newConfig);
ListView listsList = (ListView) findViewById(R.id.lists);
Button newList = (Button) findViewById(R.id.newlistbutton);
newList.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent myIntent = new Intent(v.getContext(), NewWishList.class);
startActivity(myIntent);
}
});
}
}
public class NewWishList extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.newlist);
Button back = (Button) findViewById(R.id.backbutton);
back.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent(view.getContext(), ListOfLists.class);
startActivity(intent);
}
});
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// ignore orientation/keyboard change
super.onConfigurationChanged(newConfig);
RadioGroup option = (RadioGroup) findViewById(R.id.radioGroup1);
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.wish.list"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="7" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-feature android:name="android.hardware.screen.portrait"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.Black.NoTitleBar">
<activity
android:name="com.wish.list.FacebookSignIn"
android:label="@string/app_name"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait" >
<intent-filter>
<action
android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ListOfLists"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait"
></activity>
<activity
android:name=".NewWishList"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait"
></activity>
</application>
</manifest>
清单:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.lists);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// ignore orientation/keyboard change
super.onConfigurationChanged(newConfig);
ListView listsList = (ListView) findViewById(R.id.lists);
Button newList = (Button) findViewById(R.id.newlistbutton);
newList.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent myIntent = new Intent(v.getContext(), NewWishList.class);
startActivity(myIntent);
}
});
}
}
public class NewWishList extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.newlist);
Button back = (Button) findViewById(R.id.backbutton);
back.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent(view.getContext(), ListOfLists.class);
startActivity(intent);
}
});
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
// ignore orientation/keyboard change
super.onConfigurationChanged(newConfig);
RadioGroup option = (RadioGroup) findViewById(R.id.radioGroup1);
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.wish.list"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="7" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-feature android:name="android.hardware.screen.portrait"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:screenOrientation="portrait"
android:theme="@android:style/Theme.Black.NoTitleBar">
<activity
android:name="com.wish.list.FacebookSignIn"
android:label="@string/app_name"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait" >
<intent-filter>
<action
android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ListOfLists"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait"
></activity>
<activity
android:name=".NewWishList"
android:configChanges="orientation|keyboardHidden"
android:screenOrientation="portrait"
></activity>
</application>
</manifest>
Logcat或错误日志中没有错误。这很奇怪。我使用OnConfiguration更改的原因是我将其设置为强制启用纵向方向。这些活动是在清单中定义的。请先尝试使用
MyActivity.this
用于上下文。您使用的IDE是什么?可能是安卓工作室? 这样做
希望这有帮助 什么是“v”?发布您的清单。@JeffreyBlattman public void onClick(视图v),它位于第一个活动中按钮的OnClickListener中。我现在发布清单。在onClick方法中放置断点或调试日志,可能不会调用它,因为尚未调用onConfigurationChanged来设置onClick侦听器。因此它将是新的意图(ListofList.this,NewWishList.class)?那也没用。(第一个活动是ListofList,第二个是NewWishList)首先,当活动开始时,您是否仔细观看了logcat?有时,它们中存在一些微妙的问题,而这些问题在eclipse中并没有出现。第二,你确定活动没有开始吗?它在启动时失败是出于某种原因吗?第三,您确定执行了onClick()代码吗?