当我运行应用程序时,这是我的清单文件,它说“主要活动未在AndroidManifest.xml中声明”
我尝试了重建,使缓存/重启无效,添加
<activity
android:name=".MainActivity"
android:label="@string/app_name" to my manifest
还有很多其他的东西来自stackoverflow上的其他答案,但没有解决我的问题。请帮我。我昨天做了一个apk直到那时它工作正常,但今天当我打开它时显示这个错误。
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.keval.raagbhandaar">
<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=".pprath">
</activity>
<activity android:name=".mpurn" />
<activity android:name=".mprath" />
<activity android:name=".Prambhik" />
<activity android:name=".Exams" />
<activity android:name=".Kalyan"/>
<activity android:name=".Thats" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
这是MainActivity.java
package com.keval.raagbhandaar;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
private Button button4;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button4 = (Button) findViewById(R.id.button4);
button4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
openActivityexam();
}
public void openActivityexam() {
Intent intent = new Intent(MainActivity.this, Exams.class);
startActivity(intent);
}
});
}}
logcat的
2019-03-14 17:02:33.492 5363-5363 / com.keval.raagbhandaar E / AndroidRuntime:FATAL EXCEPTION:main进程:com.keval.raagbhandaar,PID:5363 java.lang.RuntimeException:Canvas:试图绘制大(558306000bytes)位图。在android.view.DisplayListCanvas.throwIfCannotDraw(DisplayListCanvas.java:229)在android.view.RecordingCanvas.drawBitmap(RecordingCanvas.java:97)在android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:529)在机器人。在Android.view.View.View.AvadDisplayListIfDirty的android.view.View.draw(View.java:19183)的android.view.View.drawBackground(View.java:19386)上查看View.View.getDrawableRenderNode(View.java:19450) (View.java:18142)位于android.view.View.St.EvatchDraw(ViewGroup.java)的android.view.View.draw(View.java:18920)android.view.ViewGroup.drawChild(ViewGroup.java:4236) 4022)在android.view.View.View.David(View.java:18920)上的android.view.View.View.View.Stap(View.java:18920)安卓android.view.view.draw((View.java:18920)。在Android.view.View.View.draw的一个android.view.View.David(View.java:18920)的android.view.View.Starts上查看了View.ViewGroup.dispatchDraw(ViewGroup.java:4022)(View.java:181320) (ViewGroup.java:4236)在android.vi上ew.ViewGroup.dispatchDraw(ViewGroup.java:4022)位于android.view.View.View.View(View.java:18920)上的android.view.View.View.View.Starts (ViewGroup.java:4236)在android.view.View.View.draw(View.java:)的android.view.View.View.DisplayListIfDirty(View.java:18133)的android.view.ViewGroup.dispatchDraw(ViewGroup.java:4022) 18920)在android.view.ViewGroup.drawChild(ViewGroup.java:4236)的android.view.ViewGroup.dispatchDraw(ViewGroup.java:4022)at android.view.View.draw(View.java:19195)at com。 android.internal.policy.DecorView.draw(DecorView.java:788)在Android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:669)上的android.view.View.updateDisplayListIfDirty(View.java:18142) .ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:675)在android.view.ThreadedRenderer.draw(ThreadedRenderer.java:783)在android.view.ViewRootImpl.draw(ViewRootImpl.java:2992)在android.view.ViewRootImpl.performDraw(争夺wRootImpl.java:2806)在android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2359)在android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1392)在android.view.ViewRootImpl $ TraversalRunnable.run(ViewRootImpl.java :6752)在android.view.Choreographer.doCrame(Choreographer.java:658)的android.view.Choreographer $ CallbackRecord.run(Choreographer.java:911)android.view.Choreographer.doCallbacks(Choreographer.java:723)在android.view.Choreographer $ FrameDisplayEventReceiver.run(Choreographer.java:897)的android.os.Handler.handleCallback(Handler.java:790)在android.os.Handler.dispatchMessage(Handler.java:99)。 os.Looper.loop(Looper.java:164)位于com.android.internal.os的java.lang.reflect.Method.invoke(Native Method)的android.app.ActivityThread.main(ActivityThread.java:6494)。 com.android.internal.os.ZygoteInit.main中的RuntimeInit $ MethodAndArgsCaller.run(RuntimeInit.java:438)(ZygoteInit.java:807)
可能有两种情况。
1)你有你的MainActivity.java
类,但你没有创建activity_main.xml
这就是为什么你没有在你的Android清单中声明你的活动。
2)你有你的java类和xml类,但你没有在android manifest中声明你的活动。
注意:只有当您忘记在Android清单中声明您的活动时才会出现此问题。
以下可能出现此错误。
class MainActvity extends AppCompatActivity
<activity
android:name="com.keval.raagbhandaar.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
根据您的包名称:
main activity.Java
package com.keval.raagbhandaar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.keval.raagbhandaar">
<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>
</application>
</manifest>
.MainActivity
是你的类路径?
你需要设置整个路径,如“.myfolder.MainActivity
”?
您是否检查了日志java.lang.RuntimeException的错误:Canvas:尝试绘制太大(558306000bytes)的位图。在android.view.DisplayListCanvas.throwIfCannotDraw(DisplayListCanvas.java:229)的android.view.RecordingCanvas.drawBitmap(RecordingCanvas.java:97)at
这是说你正在使用的图像是大尺寸请尝试减少图像大小并再次运行。可能会起作用