Question

TL; DR：使用Textview上的简单android:drawableLeft功能导致崩溃

TextView是Android最基本的视觉元素之一。那为什么它最基本的功能不起作用呢？

https://developer.android.com/reference/android/widget/TextView.html#attr_android:drawableLeft

我的代码很简单 - 这是一个自定义对话框，使用TextView旁边的图片：

<TextView
        android:text="Text next to check mark"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"          
        android:id="@+id/textView19"
        android:drawableLeft="@drawable/ic_check_circle_white_24dp"
        android:textSize="24sp"
        android:textStyle="normal|bold"/>

该代码在可视化编辑器上提供了令人惊叹的结果：

但是当程序实际执行时，简单的android:drawableLeft功能会崩溃应用程序：

android.view.InflateException: Binary XML file line #64: Error inflating class TextView

Full stacktrace

我尝试打开对话框：

dialog = new Dialog(this,R.style.Theme_AppCompat_Light_Dialog_Alert );
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.premium_dialog);
dialog.setCanceledOnTouchOutside(false);

dialog.getWindow().setLayout((int) (getResources().getDisplayMetrics().widthPixels * 0.90), (int) (getResources().getDisplayMetrics().heightPixels * 0.90));

dialog.show();

为什么这样的基本功能是InflateException的原因？（我知道导致问题的是drawableLeft函数，因为当我删除TextView时，错误就消失了）

Answer 1

在Lower API中为VectorDrawable创建一个CustomTextView。

启动自定义Textview的属性，如下所示：

from neo4j.v1 import GraphDatabase
import timeit

start_time = 0
elapsed = 0
task = ""

def startTimer(taskIn):
    global task
    global start_time
    task = taskIn
    start_time = timeit.default_timer()

def endTimer():
    global task
    global start_time
    global elapsed
    elapsed = round(timeit.default_timer() - start_time, 3)
    print(task, elapsed)


startTimer("GraphDatabase.driver")
db = GraphDatabase.driver("bolt://localhost:7687", auth=("USERNAME", "PASSWORD"))
endTimer()

startTimer("db.session")
session = db.session()
endTimer()

startTimer("query1")
result = session.run(
        "MATCH (a:User{username:{username}}) RETURN a.username, a.password_hash ",
        {"username": "Pingu"})
endTimer()

startTimer("query2")
result = session.run(
        "MATCH (a:User{username:{username}}) RETURN a.username, a.password_hash ",
        {"username": "Pingu"})
endTimer()

startTimer("db.close")
session.close()
endTimer()

您的自定义Styleable相同。

private void initAttrs(Context context, AttributeSet attrs) {
        if (attrs != null) {
            TypedArray attributeArray = context.obtainStyledAttributes(attrs,R.styleable.CustomTextView);
            //for font
            String fontName = attributeArray.getString(R.styleable.CustomTextView_font);

            try {
                if (fontName != null) {
                    Typeface myTypeface = Typeface.createFromAsset(getContext().getAssets(), "fonts/" + fontName);
                    setTypeface(myTypeface);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }

            Drawable drawableLeft = null;
            Drawable drawableRight = null;
            Drawable drawableBottom = null;
            Drawable drawableTop = null;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                drawableLeft = attributeArray.getDrawable(R.styleable.CustomTextView_drawableLeftCompat);
                drawableRight = attributeArray.getDrawable(R.styleable.CustomTextView_drawableRightCompat);
                drawableBottom = attributeArray.getDrawable(R.styleable.CustomTextView_drawableBottomCompat);
                drawableTop = attributeArray.getDrawable(R.styleable.CustomTextView_drawableTopCompat);
            } else {
                final int drawableLeftId = attributeArray.getResourceId(R.styleable.CustomTextView_drawableLeftCompat, -1);
                final int drawableRightId = attributeArray.getResourceId(R.styleable.CustomTextView_drawableRightCompat, -1);
                final int drawableBottomId = attributeArray.getResourceId(R.styleable.CustomTextView_drawableBottomCompat, -1);
                final int drawableTopId = attributeArray.getResourceId(R.styleable.CustomTextView_drawableTopCompat, -1);

                if (drawableLeftId != -1)
                    drawableLeft = AppCompatResources.getDrawable(context, drawableLeftId);
                if (drawableRightId != -1)
                    drawableRight = AppCompatResources.getDrawable(context, drawableRightId);
                if (drawableBottomId != -1)
                    drawableBottom = AppCompatResources.getDrawable(context, drawableBottomId);
                if (drawableTopId != -1)
                    drawableTop = AppCompatResources.getDrawable(context, drawableTopId);
            }
            setCompoundDrawablesWithIntrinsicBounds(drawableLeft, drawableTop, drawableRight, drawableBottom);
            attributeArray.recycle();
        }
    }

文字旁边的图片？

1 个答案: