Activity has leaked window 原来是加了logcat错误
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【中文标题】Activity has leaked window 原来是加了logcat错误【英文标题】：Activity has leaked window that was originally added logcat error 【发布时间】：2020-12-02 01:35:25 【问题描述】：请解决我的错误。我无法弄清楚。
当我点击提交按钮时，我的应用程序崩溃了。为什么？如果您需要我的更多输入，请告诉我。
MainActivity.java
public class MainActivity extends AppCompatActivity
Button btn;
EditText txt1, txt2,txt3;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn=findViewById(R.id.button);
txt1=findViewById(R.id.editTextTextPersonName);
txt2=findViewById(R.id.editTextTextEmailAddress2);
txt3=findViewById(R.id.editTextTextPassword);
SharedPreferences pref = getSharedPreferences("mypref", MODE_PRIVATE);
Boolean islogged=pref.getBoolean("key3",false);
if (islogged)
Intent i=new Intent(MainActivity.this,MainActivity2.class);
startActivity(i);
finish();
btn.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
String email = txt2.getText().toString();
String password = txt3.getText().toString();
Intent i=new Intent(MainActivity.this,MainActivity2.class);
startActivity(i);
SharedPreferences pref = getSharedPreferences("mypref", MODE_PRIVATE);
SharedPreferences.Editor ed = pref.edit();
ed.putString("key1", email);
ed.putString("key2", password);
ed.putBoolean("key3",true);
ed.apply();
);
MainActivity2.java
public class MainActivity2 extends AppCompatActivity
Button btn;
EditText txt1, txt2;
CheckBox keeplog;
Boolean b=false;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
btn=findViewById(R.id.login);
txt1=findViewById(R.id.loginemail);
txt2=findViewById(R.id.loginpassword);
keeplog=findViewById(R.id.checkBox);
keeplog.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener()
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
b=isChecked;
);
SharedPreferences pref = getSharedPreferences("mypref", MODE_PRIVATE);
Boolean islogin=pref.getBoolean("key4",false);
if (islogin)
Intent i=new Intent(MainActivity2.this,HomeScreen.class);
startActivity(i);
finish();
btn.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
SharedPreferences pref = getSharedPreferences("mypref", MODE_PRIVATE);
String email = pref.getString("key1", null);
String password = pref.getString("key2", null);
String email2 = txt1.getText().toString();
String password2 = txt2.getText().toString();
SharedPreferences pref2 = getSharedPreferences("mypref", MODE_PRIVATE);
SharedPreferences.Editor ed = pref2.edit();
ed.putBoolean("key4",b);
ed.apply();
if (email.equals(email2) && password.equals(password2))
Intent i = new Intent(MainActivity2.this, HomeScreen.class);
startActivity(i);
finish();
);
HomeScreen.java
public class HomeScreen extends AppCompatActivity
Button button1,button2;
EditText n;
ProgressDialog pd;
String Note;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_screen);
Toast.makeText(this, "Welcome Home", Toast.LENGTH_SHORT).show();
@Override
public boolean onCreateOptionsMenu(Menu menu)
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item)
if (item.getItemId() == R.id.id1)
final AlertDialog dialogBuilder = new AlertDialog.Builder(this).create();
LayoutInflater inflater = this.getLayoutInflater();
View dialogView = inflater.inflate(R.layout.custom_dialog, null);
n = (EditText) dialogView.findViewById(R.id.edt_comment);
button1 = (Button) dialogView.findViewById(R.id.buttonSubmit);
button2 = (Button) dialogView.findViewById(R.id.buttonCancel);
dialogBuilder.setView(dialogView);
dialogBuilder.show();
button2.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
dialogBuilder.dismiss();
);
button1.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
SAVETASK();
// dialogBuilder.dismiss();
);
else if (item.getItemId() == R.id.id2)
startActivity(new Intent(HomeScreen.this,MainActivity2.class));
return super.onOptionsItemSelected(item);
public void SAVETASK()
Note = n.getText().toString();
//password = txt2.getText().toString();
class Savedata extends AsyncTask<Void, Void, Void>
@Override
protected void onPreExecute()
super.onPreExecute();
pd = new ProgressDialog(HomeScreen.this);
pd.setTitle("Saving data");
pd.setMessage("Please Wailt");
pd.show();
@Override
protected Void doInBackground(Void... voids)
Task task = new Task();
task.setNote(Note);
DatabaseClient.getInstance(getApplicationContext()).getAppDatabase().taskdao().insert(task);
return null;
@Override
protected void onPostExecute(Void aVoid)
super.onPostExecute(aVoid);
pd.dismiss();
Toast.makeText(HomeScreen.this, "Data inserted", Toast.LENGTH_SHORT).show();
// Intent intent = new Intent(HomeScreen.this, MainActivity2.class);
// startActivity(intent);
Savedata savedata = new Savedata();
savedata.execute();
Task.java
@Entity
public class Task implements Serializable
@PrimaryKey(autoGenerate = true)
private int id;
@ColumnInfo(name = "name")
private String Note;
public int getId()
return id;
public void setId(int id)
this.id = id;
public String getNote()
return Note;
public void setNote(String note)
Note = note;
TaskDao.java
@Dao
public interface TaskDao
@Query("select * from task")
List<Task> getalldata();
@Insert
void insert(Task task);
@Update
void update(Task task);
@Delete
void Delete(Task task);
AppDatabase.java
public abstract class AppDatabase extends RoomDatabase
public abstract TaskDao taskdao();
DatabaseClient.java
public class DatabaseClient
private Context context;
private static DatabaseClient mInstance;
private AppDatabase appDatabase;
private DatabaseClient(Context mctx)
this.context=mctx;
appDatabase= Room.databaseBuilder(mctx,AppDatabase.class,"MYTODO").build();
public static synchronized DatabaseClient getInstance(Context context)
if(mInstance==null)
mInstance=new DatabaseClient(context);
return mInstance;
public AppDatabase getAppDatabase()
return appDatabase;
Logcat 错误：
com.example.sharedprefdemo E/WindowManager: android.view.WindowLeaked: Activity com.example.sharedprefdemo.HomeScreen has leaked window DecorView@d93e50e[Saving data] that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:765)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:429)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:95)
at android.app.Dialog.show(Dialog.java:473)
at com.example.sharedprefdemo.HomeScreen$1Savedata.onPreExecute(HomeScreen.java:95)
at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:708)
at android.os.AsyncTask.execute(AsyncTask.java:655)
at com.example.sharedprefdemo.HomeScreen.SAVETASK(HomeScreen.java:117)
at com.example.sharedprefdemo.HomeScreen$2.onClick(HomeScreen.java:70)
at android.view.View.performClick(View.java:7870)
at android.widget.TextView.performClick(TextView.java:14970)
at android.view.View.performClickInternal(View.java:7839)
at android.view.View.access$3600(View.java:886)
at android.view.View$PerformClick.run(View.java:29363)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:237)
at android.app.ActivityThread.main(ActivityThread.java:7814)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1068)
所以当我点击提交按钮时，我的应用程序会自动崩溃。我不知道是什么原因。
【问题讨论】：
【参考方案1】：显示对话框之前
如果（对话！= null && dialog.isShowing()) dialog.dismiss();//或取消()
尝试从异步线程中移动对话框及其初始化
HomeScreen 泄露了最初添加在这里的窗口 DecorView@d93e50e[Saving data] answer to this error
【讨论】：
对不起兄弟我没听懂你说的。以上是关于Activity has leaked window 原来是加了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
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