About the Android return key code implementation

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I found that there are two ways to do this.
①, Java.lang.Runtime

1. Runtime Runtime = runtime. GetRuntime();
   
2. Runtime. EXEC("Input keyevent" + keyevent. Keycode_back);

②, Android.app.Instrumentation

1. Instrumentation Inst = new instrumentation();
   
2. Inst. Sendkeydownupsync(keyevent. Keycode_back);

have been tested successfully. You can achieve the effect of pressing back.

Reviews3) • Link 2013-03-20

• 0 give force, praise a-mottled-neo 2013-03-20
• 0 very good, thank you for your answer, both methods are feasible, that is, instrumentation is a test environment simulation, do not know my production environment with this has wood problems, there is instrumentation this thing can not be used in the main thread, But open a thread on it, thank you very much –tlchencheng 2013-04-01
• 0 @tlchencheng Are you sure that you can do this by doing this, and that the return operation is possible in any program interface? –wangqi0609342013-08-04

About the Android return key code implementation