Android Dev Notes - 25- 那些和UI相关的事

最新推荐文章于 2025-08-23 10:36:55 发布

原创最新推荐文章于 2025-08-23 10:36:55 发布 · 201 阅读

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CC 4.0 BY-SA版权

文章标签：

#android #ui #button #filter #keyboard #application

本文介绍如何在Android应用中实现标题栏进度条显示，包括确定性和不确定性进度条的设置方法，并提供了一种禁用EditText的方法，确保其无法接收输入。

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在标题栏显示进度

 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_PROGRESS);
        setProgressBarVisibility(true);          
        setContentView(R.layout.main);        
        setProgress(5000);//设置进度时，一定要放在setContentView()的后面
    }

在标题栏上显示不确定进度条

public class AndroidTestActivity extends Activity implements OnClickListener{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        setContentView(R.layout.main);
        setProgressBarIndeterminateVisibility(true);  
        Button btnStop  = (Button)findViewById(R.id.btnStop);
        btnStop.setOnClickListener(this);
    }

	@Override
	public void onClick(View v) {
		setProgressBarIndeterminateVisibility(false);		
	}    
}

禁用EditText

原文链接:http://stackoverflow.com/questions/910135/can-we-have-uneditable-text-in-edittext

You could use

editText.setFocusable(false);

editText.setEnabled(false);

although disabling the EditText does currently not ignore input from the on-screen keyboard (I think that's a bug).
Depending on the application it might be better to use an InputFilter that rejects all changes:

屏幕键盘输入有bug，禁用TextView时，屏幕键盘还是可以输入信息，解决方法是使用Filter。

实话实说，我没看懂这段代码是啥意思？

editText.setFilters(new InputFilter[] {
    new InputFilter() {
        public CharSequence filter(CharSequence src, int start,
                int end, Spanned dst, int dstart, int dend) {
                return src.length() < 1 ? dst.subSequence(dstart, dend) : "";
        }
    }
});