Question

我正在创建一个能够读取手机电话联系人的应用。但是，由于我不知道的原因，我使用query方法时遇到问题，因为我使用的是api版本。它说Call requires API level 26 (current min is 16): android.content.ContentResolver#query。

这是我在oncreate方法中使用的代码。

public void searchContacts() {
    ContentResolver contentResolver = getContentResolver();
    Cursor cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, null, null, null);

    if (cursor.moveToFirst()) {
        do {
            String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
            String number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

            Log.i("try", name + " = " + number);
        } while (cursor.moveToNext());
    }



    cursor.close();
}

我知道它应该可行，因为我一直在观看的教程的API版本比我的版本低。

这是我的gradle文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "raymundo.elsa.elsa"
        minSdkVersion 16
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:support-v4:26.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation 'gr.pantrif:easy-android-splash-screen:0.0.1'
    implementation 'com.android.support:gridlayout-v7:26.1.0'
    implementation 'com.android.support:design:26.1.0'
    implementation 'com.android.support:cardview-v7:26.1.0'
    compile 'com.liuguangqiang.cookie:library:0.1'
}

这是我的logcat中的错误。

E/AndroidRuntime: FATAL EXCEPTION: main
                      Process: raymundo.elsa.elsa, PID: 2303
                      java.lang.NoSuchMethodError: android.content.ContentResolver.query
                          at raymundo.elsa.elsa.FillUpEmergencyContacts.searchContacts(FillUpEmergencyContacts.java:130)
                          at raymundo.elsa.elsa.FillUpEmergencyContacts.onCreate(FillUpEmergencyContacts.java:52)
                          at android.app.Activity.performCreate(Activity.java:5231)
                          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
                          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2157)
                          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2243)
                          at android.app.ActivityThread.access$800(ActivityThread.java:135)
                          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
                          at android.os.Handler.dispatchMessage(Handler.java:102)
                          at android.os.Looper.loop(Looper.java:136)
                          at android.app.ActivityThread.main(ActivityThread.java:5019)
                          at java.lang.reflect.Method.invokeNative(Native Method)
                          at java.lang.reflect.Method.invoke(Method.java:515)
                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
                          at dalvik.system.NativeStart.main(Native Method).
    Application Terminated.

Answer 1

query()上有三种ContentResolver种。 four-parameter flavor that you are using是Android 8.0（API级别26）的新功能。

自API级别1以来，五参数变体已经存在，并且六级参数变体自API级别16以来一直存在。您可能希望切换到其中之一。

无法使用ContentResolver查询方法，NoSuchMethodError

1 个答案: