android从一个活动到另一个活动,Android应用程序在将一个活动打开到另一个活动时崩溃...

我正在开发Android应用程序，在我的应用程序中，我想通过单击UHFMenuActivity中的布局来打开UHFMainActivity，但应用程序正在崩溃。当我使用另一个活动而不是UHFMenuActivity时它完全正常。我认为UHFMenuActivity存在问题。

这是我的UHFMenuActivity代码......

public class UHFMenuActivity extends Activity {

LinearLayout layoutAdd, layoutScan, layoutReport, layoutList;

android调用activity方法。ImageView imageScan;

Button btnNext;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

安卓彻底关闭应用程序，setContentView(R.layout.activity_menu);

ActionBar actionBar = getActionBar();

actionBar.setDisplayShowHomeEnabled(true);

actionBar.setDisplayShowCustomEnabled(true);

actionBar.setCustomView(R.layout.custom_action_bar);

Android安卓应用程序窗口化，layoutAdd = (LinearLayout)findViewById(R.id.layoutAdd);

layoutScan = (LinearLayout)findViewById(R.id.layoutScan);

layoutReport = (LinearLayout)findViewById(R.id.layoutReport);

layoutList = (LinearLayout)findViewById(R.id.layoutList);

imageScan = (ImageView)findViewById(R.id.imageScan);

android异步任务。layoutAdd.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Intent intent = new Intent(UHFMenuActivity.this, AddStudentActivity.class);

startActivity(intent);

android应用程序结构是，}

});

layoutScan.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

安卓锁定应用程序有什么用。Intent intent = new Intent(UHFMenuActivity.this, UHFMainActivity.class);

startActivity(intent);

}

});

layoutReport.setOnClickListener(new View.OnClickListener() {

android 启动其他app、@Override

public void onClick(View v) {

Intent intent = new Intent(UHFMenuActivity.this, ViewReportActivity.class);

startActivity(intent);

}

下载Android应用程序，});

layoutList.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Intent intent = new Intent(UHFMenuActivity.this, ListStudentActivity.class);

安卓横竖屏切换activity生命周期、startActivity(intent);

}

});

}

}

activity_menu.xml

xmlns:tools="http://schemas.android.com/tools"

android:orientation="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent">

android:layout_width="match_parent"

android:layout_height="110dp">

android:layout_width="match_parent"

android:layout_height="match_parent"

android:text="Student Attendance"

android:textStyle="bold"

android:gravity="center"

android:textSize="30sp" />

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

android:layout_weight="5"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="horizontal">

android:layout_weight="5"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:gravity="center"

android:id="@+id/layoutAdd">

android:layout_width="120dp"

android:layout_height="120dp"

android:src="@drawable/add" />

android:layout_weight="5"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:gravity="center"

android:id="@+id/layoutScan">

android:id="@+id/imageScan"

android:layout_width="120dp"

android:layout_height="120dp"

android:src="@drawable/scan" />

android:layout_weight="5"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="horizontal">

android:layout_weight="5"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:gravity="center"

android:id="@+id/layoutReport">

android:layout_width="120dp"

android:layout_height="120dp"

android:src="@drawable/report" />

android:layout_weight="5"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:gravity="center"

android:id="@+id/layoutList">

android:layout_width="120dp"

android:layout_height="120dp"

android:src="@drawable/list1" />

AndroidManifest.xml代码。

package="com.example.uhf"

android:versionCode="1"

android:versionName="1.0"

android:minSdkVersion="11"

android:targetSdkVersion="15" />

android:allowBackup="true"

android:icon="@drawable/logo_thsti_trans"

android:label="AsseTrack"

android:theme="@style/CustomTheme">

android:name="com.example.uhf.activity.UHFMenuActivity"

android:windowSoftInputMode="stateAlwaysHidden"

android:screenOrientation="portrait"

android:label="@string/app_name"

>

android:windowSoftInputMode="stateAlwaysHidden"/>

这是我的日志错误。

06-15 11:26:36.831 4308-4328/com.example.uhf E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1

Process: com.example.uhf, PID: 4308

java.lang.RuntimeException: An error occured while executing doInBackground()

at android.os.AsyncTask$3.done(AsyncTask.java:300)

at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)

at java.util.concurrent.FutureTask.setException(FutureTask.java:222)

at java.util.concurrent.FutureTask.run(FutureTask.java:242)

at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)

at java.lang.Thread.run(Thread.java:841)

Caused by: java.lang.UnsatisfiedLinkError: Couldn't load DeviceAPI from loader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/com.example.uhf-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.uhf-1, /vendor/lib, /system/lib]]]: findLibrary returned null

at java.lang.Runtime.loadLibrary(Runtime.java:365)

at java.lang.System.loadLibrary(System.java:526)

at com.rscja.deviceapi.DeviceAPI.(DeviceAPI.java:1459)

at com.rscja.deviceapi.RFIDWithUHF.getDeviceAPI(RFIDWithUHF.java:41)

at com.rscja.deviceapi.RFIDWithUHF.init(RFIDWithUHF.java:214)

at com.example.uhf.activity.BaseTabFragmentActivity$InitTask.doInBackground(BaseTabFragmentActivity.java:179)

at com.example.uhf.activity.BaseTabFragmentActivity$InitTask.doInBackground(BaseTabFragmentActivity.java:173)

at android.os.AsyncTask$2.call(AsyncTask.java:288)

at java.util.concurrent.FutureTask.run(FutureTask.java:237)

at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)

at java.lang.Thread.run(Thread.java:841)

06-15 11:26:37.458 4308-4340/com.example.uhf E/ContentValues: Couldn't get json from server.

06-15 11:26:37.494 4308-4340/com.example.uhf E/ContentValues: Couldn't get json from server.

06-15 11:26:37.534 656-689/? E/InputDispatcher: channel '42467078 com.example.uhf/com.example.uhf.activity.UHFMainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!

06-15 11:26:37.534 656-689/? E/InputDispatcher: channel '4247b2d8 com.example.uhf/com.example.uhf.activity.UHFMainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!