Question

大家好，我有问题。我正在为TextView的背景使用gradientdrawable，如果文本视图没有多少行正在工作，但是如果有很多行我缺少背景，则TextView变得透明。我在android 7上看到此问题，也可以在android 4.4.2上工作... 看屏幕截图，这是确切的情况。

该如何解决？由于角半径，我需要GradientDraweable。

这是测试应用程序的完整代码

public class MainActivity extends AppCompatActivity {
String testText1="a\n" +
        "a\n" +
        "a\n" +
        "a\n" +
        "a\n" +
        "a\n" +
        "a\n" +
        "a";
String testText2="b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b\n" +
        "b";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ScrollView root=new ScrollView(this);

    TextView testWorking=new TextView(this);
    testWorking.setTextColor(Color.BLACK);
    testWorking.setTextSize(TypedValue.COMPLEX_UNIT_DIP,16);
    testWorking.setText(testText1);

    TextView testNotWorking=new TextView(this);
    testNotWorking.setTextColor(Color.BLACK);
    testNotWorking.setTextSize(TypedValue.COMPLEX_UNIT_DIP,16);
    testNotWorking.setText(testText2);


    GradientDrawable testBG=new GradientDrawable();
    float chat_msgOut_each_corner_radi[] = {20f,20f,   20f,20f,   20f,20f,  20f,20f};
    testBG.setCornerRadii(chat_msgOut_each_corner_radi);
    testBG.setStroke(10, Color.TRANSPARENT);
    testBG.setColor(Color.BLUE);

    testWorking.setBackground(testBG);
    testWorking.setGravity(Gravity.CENTER);

    testNotWorking.setBackground(testBG);
    testNotWorking.setGravity(Gravity.CENTER);

    LinearLayout ll=new LinearLayout(this);
    ll.setOrientation(LinearLayout.VERTICAL);
    ll.addView(testWorking);
    ll.addView(testNotWorking);
    root.addView(ll);
    setContentView(root);
}

谢谢。

android GradientDrawable在android 7中变得透明

0 个答案: