当文字非常长,在屏幕小的手机上无法全部文字;
Android 让 TextView 自适应大小,加入以下代码:
app:autoSizeTextType="uniform"
就可以实现以下效果,无论 TextView 大小是多少,都可以让里面的文字充满整个 TextView:
告别以前自己写递归算法,非常方便。
MainActivity 完整代码如下:
public class MainActivity extends AppCompatActivity {
TextView tv_cat;
SeekBar seekBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv_cat = findViewById(R.id.tv_cat);
seekBar = findViewById(R.id.seekBar);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
//dp转化为px
float dp = progress * 3;
final float scale = getResources().getDisplayMetrics().density;
int px = (int) (dp * scale + 0.5f);
//设置TextView高度
ViewGroup.LayoutParams params = tv_cat.getLayoutParams();
params.height = px;
params.width = px;
tv_cat.setLayoutParams(params);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
}
activity_main 完整代码:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorPrimary"
android:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="300dp"
android:gravity="center">
<TextView
android:id="@+id/tv_cat"
android:layout_width="300dp"
android:layout_height="300dp"
android:background="#FFFFFF"
android:text="你还记得那只猫吗?"
app:autoSizeTextType="uniform" />
</LinearLayout>
<SeekBar
android:id="@+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:layout_marginTop="20dp"
android:max="100"
android:min="50"
android:progress="100"
android:scrollbarStyle="outsideOverlay" />
</LinearLayout>