Android Studio Android应用未运行

Question

I am new to Android Programming.

I am using Android Studio for App Development. Till some hours back I was able to create and run applications but now something annoying has started happening.

This is independent of application so not providing any source code.

Problem : When I click on run app nothing happens. Its seems as if it is not taking any action.

Output of Rebuild Project

Executing tasks: [clean, :app:compileDebugSources, :app:compileDebugAndroidTestSources]

Configuration on demand is an incubating feature.
:app:clean
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preReleaseBuild UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72220Library
:app:prepareComAndroidSupportSupportV42220Library
:app:prepareDebugDependencies
:app:compileDebugAidl
:app:compileDebugRenderscript
:app:generateDebugBuildConfig
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources
:app:mergeDebugResources
:app:processDebugManifest
:app:processDebugResources
:app:generateDebugSources
:app:processDebugJavaRes UP-TO-DATE
:app:compileDebugJava
Note: C:\Users\Chetan\AndroidStudioProjects\MySongMixer\app\src\main\java\com\tgc\entertainment\mysongmixer\MainActivity.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

:app:compileDebugNdk UP-TO-DATE
:app:compileDebugSources
:app:preDebugAndroidTestBuild UP-TO-DATE
:app:prepareDebugAndroidTestDependencies
:app:compileDebugAndroidTestAidl
:app:processDebugAndroidTestManifest
:app:compileDebugAndroidTestRenderscript
:app:generateDebugAndroidTestBuildConfig
:app:generateDebugAndroidTestAssets UP-TO-DATE
:app:mergeDebugAndroidTestAssets
:app:generateDebugAndroidTestResValues UP-TO-DATE
:app:generateDebugAndroidTestResources
:app:mergeDebugAndroidTestResources
:app:processDebugAndroidTestResources
:app:generateDebugAndroidTestSources
:app:processDebugAndroidTestJavaRes UP-TO-DATE
:app:compileDebugAndroidTestJava
:app:compileDebugAndroidTestNdk UP-TO-DATE
:app:compileDebugAndroidTestSources

BUILD SUCCESSFUL

Total time: 1 mins 7.729 secs

Answer 1

Sometimes simply restarting your adb connection with adb kill-server the adb start-server commands will work.

I had a similar problem, which took longer to resolve, I updated Android studio, and my SDK - restarted and then it worked normally.

Hope this helps

Answer 2

Since this question is so vague I can't be sure that this will help but I would check your Run Configurations.

Make sure that package is set to "Deploy default APK"

Make sure that Activity is set to "Launch default Activity"

Make sure that Target Device is set to "Show chooser dialog" or the appropriate option for your runtime. Also, if you are using Emulator instead you should make sure that your emulator did not get corrupted and that it's properly set.