Question

我有一个活动，只要在调用onBackPressed或onOptionsItemSelected时调用前一个活动。我的代码正在开发Kitkat，Ice cream和Marshmallow。它只能在 Lollipop 中使用。这是为什么？

我的活动

@Override
public void onBackPressed() {
    super.onBackPressed();

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    super.onOptionsItemSelected(item);
    return NavUtils.navigateUpFromSameTask(this);

}

Android Manifest

    <activity
        android:name=".Activities.ReminderActivity"
        android:screenOrientation="portrait"
        android:label="@string/title_reminder_activity">

        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".Activities.MainActivity" />

    </activity>

build.grade

apply plugin: 'com.android.application'
apply from: "quality.gradle"

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

defaultConfig {
    applicationId "com.pointwest.timetrackermobilelog"
    vectorDrawables.useSupportLibrary = true
    minSdkVersion 15
    targetSdkVersion 23
    versionCode 36
    versionName "1.0"
    multiDexEnabled true
}

repositories {
    maven { url "https://jitpack.io" }
    jcenter()
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

ext {
    supportLibVersion = '23.2'  // variable that can be referenced to keep support libs consistent
    }

  }

 dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.2.+'
    compile 'com.android.support:design:23.2.+'
    compile 'com.android.support:cardview-v7:23.2.+'
    compile 'com.android.support:recyclerview-v7:23.2.+'
    compile "com.android.support:support-v4:23.2.+"
    compile 'com.squareup.retrofit:retrofit:1.9.0'
    compile 'com.jpardogo.materialtabstrip:library:1.1.0'
    compile 'com.google.android.gms:play-services:8.4.0'
    compile 'io.realm:realm-android:0.82.0'
    compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.0'
    compile 'com.squareup.okhttp:okhttp:2.0.0'
    compile 'com.android.support:multidex:1.0.0'
    compile 'com.h6ah4i.android.materialshadowninepatch:materialshadowninepatch:0.6.3'
    compile 'me.zhanghai.android.materialprogressbar:library:1.1.5'
    compile 'com.code-troopers.betterpickers:library:2.5.3'


}

Answer 1

onOptionsItemSelected是一种在您打算致电invalidateOptionsMenu()时会被召回的方法。

OnBackPressed和onOptionsItemSelected在Lollipop中不起作用

1 个答案: