有两个使用上的问题

[hpeiyan]

1. 出现manifest的冲突。

/Users/Yuseng/TimeMachine/app/src/main/AndroidManifest.xml:9:9-36 Error:
	Attribute application@icon value=(@mipmap/icon) from AndroidManifest.xml:9:9-36
	is also present at [com.github.lihangleo2:ChartView:1.0.0] AndroidManifest.xml:13:9-43 value=(@mipmap/ic_launcher).
	Suggestion: add 'tools:replace="android:icon"' to <application> element at AndroidManifest.xml:6:5-32:19 to override.
/Users/Yuseng/TimeMachine/app/src/main/AndroidManifest.xml:11:9-41 Error:
	Attribute application@roundIcon value=(@mipmap/icon) from AndroidManifest.xml:11:9-41
	is also present at [com.github.lihangleo2:ChartView:1.0.0] AndroidManifest.xml:15:9-54 value=(@mipmap/ic_launcher_round).
	Suggestion: add 'tools:replace="android:roundIcon"' to <application> element at AndroidManifest.xml:6:5-32:19 to override.

2. 你的组件ArrayList出现空指针。

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.vanchur.timemachine, PID: 5966
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.ArrayList.size()' on a null object reference
        at com.lihang.chart.ChartLineView.onLayout(ChartLineView.java:284)
        at android.view.View.layout(View.java:22836)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1103)
        at android.view.View.layout(View.java:22836)
        at android.view.ViewGroup.layout(ViewGroup.java:6316)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
        at android.view.View.layout(View.java:22836)
        at android.view.ViewGroup.layout(ViewGroup.java:6316)
        at androidx.appcompat.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:446)
        at android.view.View.layout(View.java:22836)
        at android.view.ViewGroup.layout(ViewGroup.java:6316)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
        at android.view.View.layout(View.java:22836)
        at android.view.ViewGroup.layout(ViewGroup.java:6316)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1582)
        at android.view.View.layout(View.java:22836)
        at android.view.ViewGroup.layout(ViewGroup.java:6316)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
        at com.android.internal.policy.DecorView.onLayout(DecorView.java:784)
        at android.view.View.layout(View.java:22836)
        at android.view.ViewGroup.layout(ViewGroup.java:6316)
        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3448)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2920)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1943)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8151)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)
        at android.view.Choreographer.doCallbacks(Choreographer.java:796)
        at android.view.Choreographer.doFrame(Choreographer.java:731)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)