{"id":31476,"date":"2023-01-21T19:06:38","date_gmt":"2023-01-21T13:36:38","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-android-studio-when-ever-i-run-my-app-it-says-unfortunately-app-has-stopped-duplicate\/"},"modified":"2023-01-21T19:06:38","modified_gmt":"2023-01-21T13:36:38","slug":"solved-android-studio-when-ever-i-run-my-app-it-says-unfortunately-app-has-stopped-duplicate","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-android-studio-when-ever-i-run-my-app-it-says-unfortunately-app-has-stopped-duplicate\/","title":{"rendered":"[Solved] Android Studio : When ever i run my app, it says Unfortunately app has stopped [duplicate]"},"content":{"rendered":"

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Well, Your app is crashes because of java.lang.RuntimeException:java.lang.NumberFormatException: Invalid double: \"\"<\/code>
\nthat means you are trying to convert empty string<\/code> to Double<\/code>.<\/p>\n

So, Because the EditText<\/code> is empty your app is crashes and I have re-write your code so that you can copy-paste<\/code>.<\/p>\n

Here is your MainActivity.Java<\/code><\/p>\n

package com.blogspot.techtutorialsajen.androiddevelopmentpractice;\n\nimport android.support.v7.app.AppCompatActivity;\nimport android.view.View;\nimport android.widget.Button;\nimport android.os.Bundle;\nimport android.widget.EditText;\nimport android.widget.TextView;\n\npublic class MainActivity extends AppCompatActivity{\n\nprivate Button btn1;\nprivate EditText get;\nprivate TextView result;\n@Override\nprotected void onCreate(Bundle savedInstanceState){\n    super.onCreate(savedInstanceState);\n    setContentView(R.layout.activity_main);\n    btn1 = (Button)findViewById(R.id.btn1);\n    result = (TextView)findViewById(R.id.result);\n    get = (EditText)findViewById(R.id.get);\n btn1.setOnClickListener(new View.OnClickListener() {\n            @Override\n            public void onClick(View view) {\n\n                if (get.getText().toString().isEmpty()) {\n                    Toast.makeText(MainActivity .this, \"Please input something\", Toast.LENGTH_LONG).show();\n                } else {\n                    final double value = Double.parseDouble(get.getText().toString()) \/ 1000;\n                    result.setText(String.valueOf(value));\n                }\n\n            }\n        });\n\n    }\n}\n<\/code><\/pre>\n
and here is your activity_main.XML<\/code><\/p>\n
<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<RelativeLayout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\nandroid:layout_width=\"match_parent\" android:layout_height=\"match_parent\">\n\n<EditText\n    android:id=\"@+id\/get\"\n    android:layout_height=\"wrap_content\"\n    android:layout_width=\"match_parent\"\n    android:hint=\"@string\/enter_a_number\"\n    android:layout_marginTop=\"48dp\"\n    android:inputType=\"number\"\n    android:layout_alignParentTop=\"true\"\n    android:layout_alignParentLeft=\"true\"\n    android:layout_alignParentStart=\"true\" \/>\n\n<Button\n    android:id=\"@+id\/btn1\"\n    android:text=\"@string\/button\"\n    android:layout_width=\"wrap_content\"\n    android:layout_height=\"wrap_content\"\n    android:layout_above=\"@+id\/result\"\n    android:layout_centerHorizontal=\"true\"\n    android:layout_marginBottom=\"28dp\" \/>\n\n<TextView\n    android:id=\"@+id\/result\"\n    android:layout_height=\"wrap_content\"\n    android:layout_width=\"wrap_content\"\n    android:textSize=\"20pt\"\n    android:text=\"0\"\n    android:layout_centerVertical=\"true\"\n    android:layout_centerHorizontal=\"true\" \/>\n\n<\/RelativeLayout>\n<\/code><\/pre>\n
I have added  android:inputType=\"number\"<\/code> property to your EditText<\/code> so that, now on, it will only take Number<\/code> from the user.<\/p>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            <\/span> <\/p><\/div>\n<\/div>\n
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solved Android Studio : When ever i run my app, it says Unfortunately app has stopped [duplicate] <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] Well, Your app is crashes because of java.lang.RuntimeException:java.lang.NumberFormatException: Invalid double: “” that means you are trying to convert empty string to Double. So, Because the EditText is empty your app is crashes and I have re-write your code so that you can copy-paste. Here is your MainActivity.Java package com.blogspot.techtutorialsajen.androiddevelopmentpractice; import android.support.v7.app.AppCompatActivity; import android.view.View; import … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[452,323,842],"class_list":["post-31476","post","type-post","status-publish","format-standard","hentry","category-solved","tag-android","tag-java","tag-type-conversion"],"yoast_head":"\n[Solved] Android Studio : When ever i run my app, it says Unfortunately app has stopped [duplicate] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-android-studio-when-ever-i-run-my-app-it-says-unfortunately-app-has-stopped-duplicate\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Android Studio : When ever i run my app, it says Unfortunately app has stopped [duplicate] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Well, Your app is crashes because of java.lang.RuntimeException:java.lang.NumberFormatException: Invalid double: "" that means you are trying to convert empty string to Double. So, Because the EditText is empty your app is crashes and I have re-write your code so that you can copy-paste. Here is your MainActivity.Java package com.blogspot.techtutorialsajen.androiddevelopmentpractice; import android.support.v7.app.AppCompatActivity; import android.view.View; import ... 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So, Because the EditText is empty your app is crashes and I have re-write your code so that you can copy-paste. Here is your MainActivity.Java package com.blogspot.techtutorialsajen.androiddevelopmentpractice; import android.support.v7.app.AppCompatActivity; import android.view.View; import ... 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