Question

我正在尝试使用noman zoomtextview库为textview创建一个带滚动和缩放的应用程序。我导入项目时工作正常。我添加了一个活动，并将完全相同的代码从源项目活动复制到此活动。现在应用程序崩溃了。源项目java文件名为ZoomTextView.java和activity_main.xml

one.java文件：

'(?:name\s+of\s+)(\w+)'

one.xml文件：

package noman.zoomtextview;
import android.content.Context;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.util.Log;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.widget.TextView;

public class one extends TextView {
private static final String TAG = "ZoomTextView";
private ScaleGestureDetector mScaleDetector;

private float mScaleFactor = 1.f;
private float defaultSize;

private float zoomLimit = 3.0f;


public one(Context context) {
    super(context);
    initialize();
}

public one(Context context, AttributeSet attrs) {
    super(context, attrs);
    initialize();
}

public one(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    initialize();
}

private void initialize() {
    defaultSize = getTextSize();
    mScaleDetector = new ScaleGestureDetector(getContext(), new ScaleListener());

}

public void setZoomLimit(float zoomLimit) {
    this.zoomLimit = zoomLimit;
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

@Override
public boolean onTouchEvent(@NonNull MotionEvent ev) {
    super.onTouchEvent(ev);
    mScaleDetector.onTouchEvent(ev);
    return true;
}

private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
    @Override
    public boolean onScale(ScaleGestureDetector detector) {
        mScaleFactor *= detector.getScaleFactor();
        mScaleFactor = Math.max(1.0f, Math.min(mScaleFactor, zoomLimit));
        setTextSize(TypedValue.COMPLEX_UNIT_PX, defaultSize * mScaleFactor);
        Log.e(TAG, String.valueOf(mScaleFactor));
        return true;
    }
}
}

清单文件：

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin">


<noman.zoomtextview.ZoomTextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:text="@string/twentyfive" />
</RelativeLayout>

Answer 1

您必须将新活动添加到您的清单。

这就是你必须的方式

<activity android:name=".YourNewActivity"/>

如果您的主要活动是您的新活动，那么请替换此

<activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

与

<activity android:name=".YourNewActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

添加更多活动时，zoomtextview库崩溃

1 个答案: