TextView在不同分辨率上处于不同的高度。 DIP不起作用

时间:2016-02-13 17:56:03

标签: android relativelayout density-independent-pixel

textView 下方的底部属性缩放错误,TextView在每个Android设备上的高度不同:请参阅附图。

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.bars_layout);

    RelativeLayout relativeLayout = (RelativeLayout)findViewById(R.id.bar_holder);

    BarView view = new BarView(getApplicationContext());
    int width = (int) getApplicationContext().getResources().getDimension(R.dimen.bar_width_compare);
    int height = 200;
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(width, height);
    params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
    int left = (int) getApplicationContext().getResources().getDimension(R.dimen.bar_margin_left_right);
    int right = 0;
    int bottom = (int) getApplicationContext().getResources().getDimension(R.dimen.graph_margin_bar_compare_bottom);
    params.setMargins(left, 0, right, bottom);
    view.setBackgroundColor(getApplicationContext().getResources().getColor(R.color.bar_dark_blue));
    view.setLayoutParams(params);
    relativeLayout.addView(view);

    TextView textView = new TextView(getApplicationContext());
    textView.setText("   20  ");
    textView.setTextSize(20);
    textView.setTextColor(getApplicationContext().getResources().getColor(R.color.black_text));
    width = (int) getApplicationContext().getResources().getDimension(R.dimen.bar_width);
    height = 100;

    bottom = (int) getApplicationContext().getResources().getDimension(R.dimen.graph_margin_bar_bottom);
    int offset = getApplicationContext().getResources().getDimensionPixelOffset(R.dimen.graph_margin_bar_bottom);
    int pxSize =  getApplicationContext().getResources().getDimensionPixelSize(R.dimen.graph_margin_bar_bottom);



    RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(width, height);
    params2.setMargins(0, 0, 0, bottom);
    params2.addRule(Gravity.CENTER_HORIZONTAL);
    params2.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
    params2.addRule(RelativeLayout.ALIGN_LEFT, view.getId());
    textView.setLayoutParams(params2);
    relativeLayout.addView(textView);
    }
}

bars_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_marginTop="40dp" >


<RelativeLayout
    android:id="@+id/bar_holder"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_marginTop="20dp"
    android:layout_marginBottom="10dp" >


</RelativeLayout>
</LinearLayout>

dimens.xml

<resources>
    <dimen name="graph_margin_bar_bottom">40dp</dimen>
    <dimen name="bar_width_compare">25dp</dimen>
    <dimen name="bar_margin_left_right">10dp</dimen>
    <dimen name="graph_margin_bar_compare_bottom">50dp</dimen>
    <dimen name="bar_width">50dp</dimen>
</resources>

以下是两部手机的例子,但每部手机的外观都不同......

三星Galaxy Tab 3 Lite(密度1.0)

enter image description here

三星Galaxy S4(密度3.0)

enter image description here

3 个答案:

答案 0 :(得分:3)

Android将所有实际屏幕尺寸分为四种通用尺寸:小尺寸,普通尺寸,大尺寸和超大尺寸。

为&#34; layout&#34;创建三个floder对于正常的小屏幕 布局 - 大屏幕 layout-xlarge for extra-large screen

将相同的bars_layout.xml添加到所有floder中,并根据屏幕大小增加大小(例如,如果布局中的保持大小为10 dp,则布局大,则将该大小增加到30 dp,而layout-xlarge则为60dp)< / p>

对于dimens.xml小和普通屏幕,将其添加到&#34;值&#34; floder 对于大屏幕添加值 - 大型floder 对于超大的添加值-xlarge

答案 1 :(得分:1)

setMargins(int,int,int,int)使用的是像素,而不是DIP,所以在每个设备上,相同大小的像素看起来不同,你需要将DIP转换为像素,然后使用该值将setMargins()转换为

答案 2 :(得分:0)

将文本高度与densityDpi相乘,并将文本大小与scaledDensity值相乘。所以它将支持不同的决议。

DisplayMetrics dm = context.getResources().getDisplayMetrics();
int densityDpi = dm.densityDpi;
float spi = dm.scaledDensity;
textheight = 100 * densityDpi;
textSize = 20 * spi;