我只想问你为什么使用intent会让我的系统崩溃？我之前使用过相同的代码并且它有效，然后当我再次使用它时，它现在就赢了。你觉得这个问题怎么样？
清单
<?xml version="1.0" encoding="utf-8"?>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Login"
android:label="@string/title_activity_login" >
</activity>
</application>
MainActivity
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void okay(View view) {
Intent i = new Intent(this, Login.class);
startActivity(i);
public class Login extends ActionBarActivity {
ListView listView;
ArrayAdapter<String> adapter;
String[] grocery_categories = {"Beverages", "Bakery", "Canned Goods", "Condiments", "Dairy", "Snacks", "Frozen Foods",
"Meat", "Produce", "Cleaners", "Paper Goods", "Personal Care", "Others"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
listView = (ListView) findViewById(R.id.list_view);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, grocery_categories);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> listView, View view, int position, long id) {
String grocery = (String) listView.getAdapter().getItem(position);
Intent intent = new Intent(listView.getContext(),Login.class);
listView.getContext().startActivity(intent);
//or create other intents here
}
});
}
MainActivity的XML
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context=".MainActivity"
android:id="@+id/rl_main_activity">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/mobile_grocery_bckgrnd"
android:src="@drawable/mobile_grocery"
android:scaleType="centerCrop"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MOBILE GROCERY"
android:id="@+id/mobile_grocery_app"
android:textSize="45dp"
android:textColor="#000000"
android:gravity="center"
android:textStyle="bold|italic"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Application"
android:id="@+id/application"
android:textColor="#000000"
android:textSize="25dp"
android:layout_below="@+id/mobile_grocery_app"
android:layout_centerHorizontal="true" />
<EditText
android:layout_width="200dp"
android:layout_height="wrap_content"
android:id="@+id/username"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/application"
android:layout_alignEnd="@+id/application"
android:layout_marginBottom="135dp"
android:hint="Username"
android:textColorHint="#000000"
/>
<EditText
android:layout_width="200dp"
android:layout_height="wrap_content"
android:id="@+id/password"
android:layout_alignTop="@+id/username"
android:layout_alignRight="@+id/username"
android:layout_alignEnd="@+id/username"
android:layout_marginTop="52dp"
android:hint="Password"
android:textColorHint="#000000"
android:password="true" />
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="OK"
android:id="@+id/ok"
android:layout_below="@+id/password"
android:layout_alignLeft="@+id/application"
android:layout_alignStart="@+id/application"
android:onClick="okay" />
登录活动的XML（第二个活动）
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/login_bckgrnd"
android:src="@drawable/login_bckgrnd"
android:scaleType="centerCrop"
/>
<ListView
android:id="@+id/list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.admin.mobilegroceryapp" >
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Login"
android:label="@string/title_activity_login" >
</activity>
</application>
</manifest>
logcat的
.085 2019-2087/? I/InputDispatcher﹕ Delivering touch to current input target: action: 0x0
09-29 01:54:28.085 2019-2087/? I/InputDispatcher﹕ Delivering touch to current input target: action: 0x0
09-29 01:54:28.085 2019-2087/? I/InputDispatcher﹕ Delivering touch to current input target: action: 0x0
09-29 01:54:28.085 2019-2087/? I/InputDispatcher﹕ Delivering touch to current input target: action: 0x0
09-29 01:54:28.085 2019-2087/? I/InputDispatcher﹕ Delivering touch to current input target: action: 0x0
09-29 01:54:28.190 2019-2088/? I/InputReader﹕ Touch event's action is 0x1 (deviceType=0) [pCnt=1, s=]
09-29 01:54:28.285 30351-30351/? I/dalvikvm﹕ Could not find method android.graphics.Bitmap.getAllocationByteCount, referenced from method com.facebook.imagepipeline.a.d.a.a
09-29 01:54:28.285 30351-30351/? W/dalvikvm﹕ VFY: unable to resolve virtual method 625: Landroid/graphics/Bitmap;.getAllocationByteCount ()I
09-29 01:54:28.285 30351-30351/? D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0006
09-29 01:54:28.355 30482-30482/? D/dalvikvm﹕ WAIT_FOR_CONCURRENT_GC blocked 0ms
09-29 01:54:28.355 2019-2074/? D/BatteryService﹕ update start
09-29 01:54:28.360 2019-2079/? D/KeyguardViewMediator﹕ setHidden false
09-29 01:54:28.360 1732-1732/? I/SurfaceFlinger﹕ id=13169 Removed TcreenSaver idx=4 MapSz=10
希望有些亲帮我解决问题。有人说这很简单，但我无法解决先生。
答案 0 :(得分：0)
您需要将登录活动添加到AndroidManifest.xml，以便Android操作系统可以找到意图引用的活动。
<activity
android:name=".Activities.Login"
android:label="Login" />
答案 1 :(得分：0)
您真的需要向我们展示您的堆栈跟踪以获得任何有用的反馈。我怀疑您没有正确地在handlebars中声明登录活动。
LogCat将包含错误堆栈跟踪。很可能你会看到一个巨大的红色文本块，表示我们感兴趣的部分。下面是我的一个堆栈跟踪的例子。希望它可以帮助您找到它。
api.use(['blaze-html-templates', 'handlebars'], 'client', {weak: true});