小编Use*_*ser的帖子

我正在创建一个 android 应用程序，我在其中缩放ImageView[捏缩放（带图像翻译）]，而且我必须ImageView只用两个手指移动来旋转它。因为我想通过单指移动来翻译Image [scroll]。当我没有添加旋转代码时，捏合缩放和平移工作得很好，但是在添加旋转编码后，图像在单指移动时旋转并且不平移。我想有一个检查，只要用户是在两个手指移动ImageView，然后图像应转动，否则不能使图像翻译将不会受到干扰。如何实现？这是我的代码。任何帮助将不胜感激

public class CustomizedImageView extends ImageView {
Matrix matrix;
// We can be in one of these 3 states
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;

int mode = NONE;

// Remember some things for zooming
PointF last = new PointF();
PointF start = new PointF();
float minScale = 1f;
float maxScale = 3f;
float[] …

在我的应用程序中，我想使用一个文本视图，它的文本的一半应该是黑色，另一半应该是绿色，我还希望绿色部分是可点击的。我发现了一些显示如何更改颜色或如何使可点击的帖子，但我无法找到两者的组合。我自己实现了这个想法，但问题是应该可点击的字符串不可点击。如何解决这个问题？任何帮助将不胜感激。这是我的代码

String firststring="Hello i am a textiew";
lString secondstring="ClickMe";
SpannableStringBuilder builder = new SpannableStringBuilder();
SpannableString firstStringSpannable = new SpannableString(firststring);
firstStringSpannable .setSpan(new ForegroundColorSpan(Color.BLACK), 0, firststring.length(), 0);
builder.append(firstStringSpannable );

String space = " ";
SpannableString spaceSpannable = new SpannableString(space);
builder.append(spaceSpannable);

SpannableString secondSpannable = new SpannableString(secondstring);
secondSpannable .setSpan(new ForegroundColorSpan(Color.GREEN), 0, 
builder.append(secondSpannable );

textview.setText(builder, TextView.BufferType.SPANNABLE);
String comepleteString = firststring + " " + secondstring;
SpannableString spannableString = new SpannableString(comepleteString);
int startIndex = comepleteString.indexOf(secondstring);
int endIndex = startIndex + secondstring.length();

Spannable Spannable = (Spannable) textview.getText(); …

我正在开发一个使用 Secure-Gen 指纹 SDK 的 Android 应用程序。为此，我使用jniLibs并且应用程序具有加密解密功能，因此我使用CMake在native-lib.cpp文件中保存了一些密码。

当我不使用 CMake 时，一切正常，但同时使用两者会在使用指纹 SDK 的屏幕上引发异常。

以下是异常的堆栈跟踪：

java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/app.mypackagename.debug-2/base.apk", zip file "/data/app/app.mypackagename.debug-2/split_lib_slice_0_apk.apk"],nativeLibraryDirectories=[/data/app/app.mypackagename.debug-2/lib/arm, /data/app/app.mypackagename.debug-2/base.apk!/lib/armeabi-v7a, /data/app/app.mypackagename.debug-2/split_lib_slice_0_apk.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib, /system/vendor/lib, /product/lib]]] couldn't find "libjnisgfplib.so"
        at java.lang.Runtime.loadLibrary0(Runtime.java:989)
        at java.lang.System.loadLibrary(System.java:1533)
        at SecuGen.FDxSDKPro.JSGFPLib.<clinit>(JSGFPLib.java:196)
        at app.mypackagename.modules.home.fragments.VerifyBiometricFragment.onCreateView(VerifyBiometricFragment.java:114)
        at android.support.v4.app.Fragment.performCreateView(Fragment.java:2439)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1460)
        at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1784)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1852)
        at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:802)
        at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2625)
        at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2411)
        at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2366)
        at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2273)
        at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:733)
        at android.os.Handler.handleCallback(Handler.java:761)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:156)
        at android.app.ActivityThread.main(ActivityThread.java:6617)
        at java.lang.reflect.Method.invoke(Native Method)

下面是 build.gradle 文件部分

apply plugin: 'com.android.application' …

我正在使用两个带有多个单选按钮的无线电组,我想检查选择了哪个单选按钮,以便我可以相应地调用特定功能.我使用getCheckedRadioButtonId方法来执行此操作,但它抛出空指针异常.如何以正确的方式完成这项工作？我也试过其他方法.任何帮助将不胜感激.这是我的代码

public class MainActivity extends AppCompatActivity {
private EditText et_name;
private EditText et_age;
private EditText et_contactno;

private RadioGroup radioGroup_gender;
private RadioButton radioButton_male;
private RadioButton radioButton_female;
private RadioGroup radioGroup_methods;
private RadioGroup radioGroup_intent_methods;
private RadioButton radioButton_textfile;
private RadioButton radioButton_sharefpref;
private RadioButton radioButton_database;
private RadioButton radioButton_staticfields;
private RadioButton radioButton_intents;
private RadioButton radioButton_direct;
private RadioButton radioButton_bundle;
private RadioButton radioButton_parcelable;

private String name;
private String age;
private String contact_no;
private String gender;

private int gender_selected_id;
private int transfer_method_selected_id;
private int selected_intent_method_id;


@Override
protected …

在我的应用程序中,我使用包含许多项目的回收站视图,我想在项目之间显示一个无线分隔符(分隔线),但它不起作用.我已经尝试创建一个可绘制的形状,但是如果在dividerItemDecoration中添加drawable,则不会在回收器视图项之间显示空格或线.我也尝试过创建自定义的DividerItemDecoration类,但对我来说没什么用. 注意:目前在我的drawable形状设置为矩形我也试过线.如何实现.任何帮助将不胜感激.这是我的代码.

绘制对象:(customdrawableshape.xml)

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <stroke
        android:width="3dp"
        android:height="2dp"
        android:color="#000000"
        android:dashGap="10dp"
        android:dashWidth="5dp" />

</shape>

回收站视图项的自定义行

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:layout_marginBottom="2dp">

    <TextView
        android:id="@+id/tv_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

以及我将项目装饰设置为recyclerview的代码部分

DividerItemDecoration dividerItemDecoration;
recyclerview.setLayoutManager(linearlayoutmanager);
dividerItemDecoration = new DividerItemDecoration(recyclerview.getContext(),
        linearlayoutmanager.getOrientation());
dividerItemDecoration.setDrawable(ContextCompat.getDrawable(context, R.drawable.customdrawableshape));
recyclerview.addItemDecoration(dividerItemDecoration);

我想在我的应用程序中实现此进度栏。所谓的什么以及如何实现这种进度条？任何帮助将不胜感激必需的输出：