闪屏崩溃（Logcat 错误）
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【中文标题】闪屏崩溃（Logcat 错误）【英文标题】：Splash screen crashes (Logcat errors) 【发布时间】：2015-12-09 12:53:23 【问题描述】：我正在开发一个 android 应用程序，当我运行我的应用程序时它崩溃了 每次。我在这里发布了一些 logcat 错误。我不知道该怎么办。 这是我的启动画面代码：
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Thread welcomeThread = new Thread()
@Override
public void run()
try
super.run();
sleep(2000); //Delay of 3 seconds
catch (Exception e)
finally
Intent i = new Intent(MainActivity.this,
MaainActivity.class);
startActivity(i);
finish();
;
welcomeThread.start();
@Override
public boolean onCreateOptionsMenu(Menu menu)
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.contact_list, menu);
return true;
@Override
public boolean onOptionsItemSelected(MenuItem item)
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings)
return true;
return super.onOptionsItemSelected(item);
第二页：
EditText etPhoneNumber;
EditText RandomNumber;
Button Submit;
Button response;
protected String PhoneNumber;
protected String EnteredNumber;
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
StrictMode.ThreadPolicy policy= new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
setContentView(R.layout.activity_main);
etPhoneNumber=(EditText) findViewById(R.id.editText1);
RandomNumber =(EditText) findViewById(R.id.editText2);
Submit= (Button) findViewById(R.id.button1);
response = (Button)findViewById(R.id.button2);
response.setOnClickListener(this);
Submit.setOnClickListener(new View.OnClickListener()
InputStream is=null;
@Override
public void onClick(View arg0)
// TODO Auto-generated method stub
PhoneNumber=""+etPhoneNumber.getText().toString();
Log.i("Tag","Phone number: "+PhoneNumber);
List<NameValuePair> nameValuePairs =new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("PhoneNumber", PhoneNumber));
try
HttpClient httpClient= new DefaultHttpClient();
HttpPost httpPost=new HttpPost("http://192.168.0.4/older/index.php");
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response =httpClient.execute(httpPost);
Log.i("Tag","UR;"+ response);
HttpEntity entity =response.getEntity();
Log.i("Tag","UR;"+ entity);
is = entity.getContent();
String msg="Data is entered successfully" +PhoneNumber;
Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();
catch(ClientProtocolException e)
Log.e("ClientProtocol","Log_tag");
e.printStackTrace();
System.out.println("Excep: "+e);
catch(IOException e)
Log.e("Log_tag","IOException");
e.printStackTrace();
);
//New Thread
Thread thread =new Thread (new Runnable()
@Override public void run()
OnClickListener stopListener = new OnClickListener()
InputStream is=null;
public void onClick(View v)
String result = "";
EnteredNumber=""+RandomNumber.getText().toString();
List<NameValuePair> nameValuePairs =new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("PhoneNumber", PhoneNumber));
nameValuePairs.add(new BasicNameValuePair("EnteredNumber", EnteredNumber));
Toast.makeText(getApplicationContext(), "You entered"+ EnteredNumber, Toast.LENGTH_LONG).show();
try
HttpClient httpClient= new DefaultHttpClient();
HttpPost httpPost=new HttpPost("http://192.168.0.4/older/check.php");
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response =httpClient.execute(httpPost);
HttpEntity entity =response.getEntity();
is = entity.getContent();
catch(ClientProtocolException e)
Log.e("ClientProtocol","Log_tag");
e.printStackTrace();
System.out.println("Excep: "+e);
catch(IOException e)
Log.e("Log_tag","IOException");
e.printStackTrace();
try
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
sb.append(line + "\n");
reader.close();
is.close();
result=sb.toString();
catch(Exception e)
Log.e("log_tag", "Error converting result "+e.toString());
try
Log.i("log_tag","result: "+ result);
JSONObject jArray = new JSONObject(result);
String returnString = "";
returnString = jArray.getString("RandomNumber");
Toast.makeText(getApplicationContext(), "json is :" + returnString, Toast.LENGTH_LONG).show();
Log.i("log_tag","value:"+jArray.getString("RandomNumber"));
if (!jArray.isNull("returnString"))
JSONObject Object = jArray.getJSONObject("returnString");
boolean retVal;
retVal = returnString.equals("0");
if(retVal)
Toast.makeText(getApplicationContext(), "User verified ", Toast.LENGTH_LONG).show();
Intent intent = new Intent(MaainActivity.this, ContactList.class);
startActivity(intent);
else Toast.makeText(getApplicationContext(), "not verified", Toast.LENGTH_LONG).show();
catch(JSONException e)
Log.e("log_tag", "Error parsing data "+e.toString());
;
response.setOnClickListener(stopListener);
);
thread.start();
@Override
public boolean onCreateOptionsMenu(Menu menu)
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.contact_list, menu);
return true;
@Override
public boolean onOptionsItemSelected(MenuItem item)
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings)
return true;
return super.onOptionsItemSelected(item);
@Override
public void onClick(View v)
// TODO Auto-generated method stub
Logcat 错误：
09-13 07:02:49.884: E/AndroidRuntime(1395): FATAL EXCEPTION: main
09-13 07:02:49.884: E/AndroidRuntime(1395): Process: com.example.verificationdatabase, PID: 1395
09-13 07:02:49.884: E/AndroidRuntime(1395): java.lang.NoClassDefFoundError: android.support.v7.appcompat.R$styleable
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.support.v7.internal.app.AppCompatViewInflater.themifyContext(AppCompatViewInflater.java:168)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.support.v7.internal.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:79)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:912)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:966)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:684)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
09-13 07:02:49.884: E/AndroidRuntime(1395): at com.android.internal.policy.impl.PhoneWindow.generateLayout(PhoneWindow.java:3022)
09-13 07:02:49.884: E/AndroidRuntime(1395): at com.android.internal.policy.impl.PhoneWindow.installDecor(PhoneWindow.java:3085)
09-13 07:02:49.884: E/AndroidRuntime(1395): at com.android.internal.policy.impl.PhoneWindow.getDecorView(PhoneWindow.java:1678)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.support.v7.app.AppCompatDelegateImplV7.onCreate(AppCompatDelegateImplV7.java:148)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:60)
09-13 07:02:49.884: E/AndroidRuntime(1395): at com.example.verificationdatabase.MainActivity.onCreate(MainActivity.java:14)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.app.Activity.performCreate(Activity.java:5231)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.app.ActivityThread.access$800(ActivityThread.java:135)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.os.Handler.dispatchMessage(Handler.java:102)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.os.Looper.loop(Looper.java:136)
09-13 07:02:49.884: E/AndroidRuntime(1395): at android.app.ActivityThread.main(ActivityThread.java:5001)
09-13 07:02:49.884: E/AndroidRuntime(1395): at java.lang.reflect.Method.invokeNative(Native Method)
09-13 07:02:49.884: E/AndroidRuntime(1395): at java.lang.reflect.Method.invoke(Method.java:515)
09-13 07:02:49.884: E/AndroidRuntime(1395): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
09-13 07:02:49.884: E/AndroidRuntime(1395): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
09-13 07:02:49.884: E/AndroidRuntime(1395): at dalvik.system.NativeStart.main(Native Method)
09-13 07:19:56.444: I/Process(1395): Sending signal. PID: 1395 SIG: 9
【问题讨论】：
就在最顶部，它告诉您类定义有问题。 现在 logcat 显示这个 09-13 08:17:20.704: E/AndroidRuntime(1818): FATAL EXCEPTION: main 09-13 08:17:20.704: E/AndroidRuntime(1818): Process : com.example.verificationdatabase, PID: 1818 09-13 08:17:20.704: E/AndroidRuntime(1818): java.lang.RuntimeException: 无法启动活动 ComponentInfocom.example.verificationdatabase/com.example.verificationdatabase. MaainActivity：java.lang.NullPointerException 09-13 08:17:20.704：E/AndroidRuntime(1818)：在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184) 【参考方案1】：您能否检查一下您是否在清单文件中添加了此活动。我认为它不见了。
【讨论】：
现在我的控制台显示此错误我之前从未见过该错误:( [2015-09-13 06:06:34 - Dex Loader] 无法执行 dex：多个 dex 文件定义 Landroid/support /v7/app/ActionBar$DisplayOptions; [2015-09-13 06:06:34 - VerificationDatabase] 转换为 Dalvik 格式失败：无法执行 dex：多个 dex 文件定义 Landroid/support/v7/app/ActionBar$DisplayOptions; [2015-09-13 06:41:40 - Dex Loader] 无法执行 dex：多个 dex 文件定义 Landroid/support/v7/app/ActionBar$DisplayOptions;; 现在我的 logcat 中有一个空指针异常。 09-15 02:59:27.040: E/AndroidRuntime(1004): 致命异常: main09-15 02:59:27.040: E/AndroidRuntime(1004): Process:com.example.verificationdatabase, PID: 1004 09-15 02 ：59：27.040：E / AndroidRuntime（1004）：java.lang.RuntimeException：无法启动活动ComponentInfo com.example.verificationdatabase/com.example.verificationdatabase.MaainActivity：java.lang.NullPointerException 09-15 02:59 :27.040: E/AndroidRuntime(1004): 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)09-15 02:59:27.040: E/AndroidRuntime(1004) 你能把你的活动粘贴到清单文件中吗？在这里，我想我表现出一些拼写错误。以上是关于闪屏崩溃（Logcat 错误）的主要内容，如果未能解决你的问题，请参考以下文章