Android应用仅API Level 23崩溃，API 24正常求助

Hey there! As someone who’s debugged tons of version-specific Android crashes, let’s break down why your app is failing on API 23 (Android 6.0) but running smoothly on API 24+. The key here is that API 23 introduced critical changes that often trip up new developers—let’s cover the most likely fixes step by step:

1. Runtime Permission Issues (Most Common Culprit) #

Android 6.0 (API 23) was the first version to require runtime permission requests for "dangerous" permissions (like storage, camera, location). If your app tries to access these features without checking/requesting permission first, it’ll throw a SecurityException and crash—even if you’ve declared the permission in AndroidManifest.xml.

Fix Example: #

Let’s say you’re accessing external storage. Add this check before performing the operation:

// Kotlin example
private const val REQUEST_STORAGE_PERMISSION = 1001

fun accessStorage() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) 
        != PackageManager.PERMISSION_GRANTED) {
        // Request permission from the user
        ActivityCompat.requestPermissions(
            this,
            arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
            REQUEST_STORAGE_PERMISSION
        )
    } else {
        // Permission is granted—proceed with your storage operation
        loadFilesFromStorage()
    }
}

// Don’t forget to handle the permission result
override fun onRequestPermissionsResult(
    requestCode: Int,
    permissions: Array<out String>,
    grantResults: IntArray
) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults)
    if (requestCode == REQUEST_STORAGE_PERMISSION) {
        if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            loadFilesFromStorage()
        } else {
            // User denied permission—show a message explaining why you need it
            Toast.makeText(this, "Storage permission is required to load files", Toast.LENGTH_SHORT).show()
        }
    }
}

2. XML Layout Attributes Unsupported in API 23 #

Some layout attributes were added in API 24 (Android 7.0) and later. If your XML uses these attributes without version checks, it’ll cause an InflateException when the layout loads on API 23.

Common Offenders: #

• android:layout_marginHorizontal (use android:layout_marginLeft + android:layout_marginRight for API <24)
• android:foregroundGravity
• android:paddingHorizontal

Fix: #

Either replace the attribute with compatible alternatives, or use version-specific resources:

<!-- Use marginLeft/marginRight instead of marginHorizontal for older APIs -->
<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="16dp"
    android:layout_marginRight="16dp"
    tools:targetApi="24" /> <!-- Tells lint this is intended for API 24+ -->

Or set the attribute dynamically in code with version checks:

// Java example
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
    textView.setForegroundGravity(Gravity.CENTER);
}

3. Verify Build.Gradle Configuration #

Your provided snippet only shows the plugin declaration—let’s check a few key settings:

• targetSdkVersion: If this is set to 24+, your app will enforce API 23+ permission behavior even on API 23 devices. Make sure you’re handling runtime permissions as outlined above.
• Dependency Versions: Outdated libraries might have compatibility issues with API 23. Try updating your AndroidX dependencies (like appcompat, recyclerview) to the latest stable versions.

4. Share the Full Crash Log #

The line --------- beginning of crash is just the start—we need the full stack trace to pinpoint the exact issue. Look in Logcat for lines starting with Caused by:—that’s where the root cause lives. For example, a SecurityException points to permissions, while an InflateException points to layout problems.

内容的提问来源于stack exchange，提问作者Farhan Saikh