Android开发笔记（三十六）展示类控件

			InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);  
			//软键盘如果已经打开则关闭之
			if (imm.isActive() == true) {
				imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
			}

			InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
			imm.hideSoftInputFromWindow(et_server.getWindowToken(), 0);

import com.example.exmsimplewidget.R;

import java.text.SimpleDateFormat;
import java.util.Date;

import android.app.Activity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class LiveTextActivity extends Activity implements OnClickListener {
	
	private TextView tv_live;
	private EditText et_news;
	private Button btn_publish;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_live_text);
		
		tv_live = (TextView) findViewById(R.id.tv_live);
		et_news = (EditText) findViewById(R.id.et_news);
		btn_publish = (Button) findViewById(R.id.btn_publish);
		btn_publish.setOnClickListener(this);
		
		tv_live.setGravity(Gravity.LEFT|Gravity.BOTTOM);
		tv_live.setLines(20);
		tv_live.setMaxLines(20);
		tv_live.setMovementMethod(new ScrollingMovementMethod());
	}

	@Override
	public void onClick(View v) {
		if (v.getId() == R.id.btn_publish) {
			String desc = String.format("%s\n直播员 %s：%s", 
					tv_live.getText(), getNowDateTime(), et_news.getText());
			tv_live.setText(desc);
		}
	}

	private String getNowDateTime() {
		SimpleDateFormat s_format = new SimpleDateFormat("HH:mm:ss");
		Date d_date = new Date();
		String s_date = "";
		s_date = s_format.format(d_date);
		return s_date;
	}

}

import com.example.exmsimplewidget.R;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.text.Editable;
import android.text.InputType;
import android.text.Selection;
import android.text.TextWatcher;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.widget.Button;
import android.widget.EditText;

public class EnterInfoActivity extends Activity {
	
	private final static String TAG = "EnterInfoActivity";
	
	private EditText et_user, et_password, et_job;
	private Button btn_cancel, btn_ok;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_enter_info);
		
		et_user = (EditText) findViewById(R.id.et_user);
		et_password = (EditText) findViewById(R.id.et_password);
		et_job = (EditText) findViewById(R.id.et_job);
		btn_cancel = (Button) findViewById(R.id.btn_cancel);
		btn_ok = (Button) findViewById(R.id.btn_ok);
		
		et_user.setInputType(InputType.TYPE_CLASS_TEXT);
		et_password.setInputType(InputType.TYPE_CLASS_TEXT|InputType.TYPE_TEXT_VARIATION_PASSWORD);
		et_job.setInputType(InputType.TYPE_CLASS_TEXT);

		et_user.setOnKeyListener(new MyKeyListener(et_password, mUserRefresh));
		et_password.addTextChangedListener(new MyTextWatcher(et_password, et_job));
		et_job.addTextChangedListener(new MyTextWatcher(et_job, btn_ok));
	}

	private final Handler mHandler = new Handler();
	private Runnable mUserRefresh = new Runnable() {
		@Override
		public void run() {
			et_user.setText(et_user.getText().toString().replace("\r", "").replace("\n", ""));
		}
	};

	class MyKeyListener implements OnKeyListener {

		private View mNextView = null;
		private Runnable mRun = null;
		public MyKeyListener(View vNext, Runnable run) {
			super();
			if (vNext != null) {
				mNextView = vNext;
			}
			mRun = run;
		}

		@Override
		public boolean onKey(View v, int keyCode, KeyEvent event) {
			if(keyCode == 66 && mNextView != null) {
		        mHandler.postDelayed(mRun, 50);
				mNextView.requestFocus();
				if (mNextView instanceof EditText) {
					EditText et = (EditText)mNextView;
					et.setSelection(et.getText().length());
				}
			}
			return false;
		}
	}

	class MyTextWatcher implements TextWatcher {
		 
		private EditText mThisView = null;
		private View mNextView = null;
		 
		public MyTextWatcher(EditText vThis, View vNext) {
			super();
			mThisView = vThis;
			if (vNext != null) {
				mNextView = vNext;
			}
		}
		
		@Override
		public void beforeTextChanged(CharSequence s, int start, int count, int after) {
		}

		@Override
		public void onTextChanged(CharSequence s, int start, int before, int count) {
		}

		@Override
		public void afterTextChanged(Editable s) {
			Log.d(TAG, "et_user.getText()="+et_user.getText());
			String str = s.toString();
			if (str.indexOf("\r") >= 0 || str.indexOf("\n") >= 0) {
				Log.d(TAG, "afterTextChanged mThisView.getId()="+mThisView.getId()
						+", mNextView.getId()="+mNextView.getId());
				mThisView.setText(str.replace("\r", "").replace("\n", ""));
				if (mNextView != null) {
					mNextView.requestFocus();
					if (mNextView instanceof EditText) {
						EditText et = (EditText)mNextView;
						Editable edit = et.getText();
						Selection.setSelection(edit, edit.length());
					}
				}
			}
		}
	 }
}