答案 0 :(得分:2)
您可以尝试以下方法:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
View progress = findViewById(R.id.progress);
// from -1 to 0
float desiredPercentage = -0.6f;
TranslateAnimation anim = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -1,
Animation.RELATIVE_TO_PARENT, desiredPercentage, Animation.RELATIVE_TO_PARENT,
0, Animation.RELATIVE_TO_PARENT, 0);
anim.setDuration(3000);
anim.setFillAfter(true);
progress.startAnimation(anim);
progress.setVisibility(View.VISIBLE);
}
在布局中:
<LinearLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_centerInParent="true"
android:layout_margin="10dp"
android:background="@android:color/holo_green_dark">
<View
android:id="@+id/progress"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_red_dark"
android:visibility="invisible"
/>
</LinearLayout>
希望有所帮助