[英]How to make discrete seek/progress bar in android?
雖然它是由很多庫實現的,但我需要在不使用庫的情況下實現它。
我在水平線性布局中使用視圖,並根據需要顯示的部分數量或狀態故事的數量動態划分它。
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity">
<LinearLayout
android:id="@+id/layout_views"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:orientation="horizontal"
android:padding="4dp" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="32dp"
android:text="Click" />
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
String TAG = "MainActivity";
Button mButton;
int x=0,height,width,numberOfSections;
LinearLayout layoutViews;
ArrayList<View> viewsList =new ArrayList<>();
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//findviews
layoutViews = findViewById(R.id.layout_views);
mButton = (Button) findViewById(R.id.button);
//for getting dimensions of screen
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
height = displayMetrics.heightPixels;
width = displayMetrics.widthPixels;
//suppose we have to cut section into 4 parts
numberOfSections = 10;
width -= (16 + 16*numberOfSections); //reducing length of layout by 16dp from left and right and in between 16dp {in between*number of sections)
width /= numberOfSections;
for(int i=0;i<numberOfSections;i++){
View v = new View(this);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width, 10);
params.setMargins(16,0,0,0); //giving 16dp internal margin between two views
v.setLayoutParams(params);
viewsList.add(v); //adding views in array list for changing color on click of button
v.setBackgroundColor(getResources().getColor(colorAccent));
layoutViews.addView(v);
}
//button onclick function
mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
buttonClick();
}
});
}
public void buttonClick(){
viewsList.get(x).setBackgroundColor(getResources().getColor(colorPrimaryDark));
x++;
}
}
沃耶拉! 盡管您可以在視圖中添加過渡 animation,但您已經制作了這個動態故事進度條。
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