Android activity之间数据传递示例(简单登录demo)

【实例简介】

Activity和Intent应用。实现两个Activity的跳转和两个Activity之间数据传输

【实例截图】

【核心代码】

package com.example.test_user_pw;

import android.os.Bundle;
import android.app.Activity;
import android.os.Bundle;
import android.preference.Preference;
import android.app.Activity;
import android.app.SearchManager.OnCancelListener;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;

public class Welcome extends Activity implements OnClickListener {
	private EditText uname = null;
	private EditText upswd = null;
	private CheckBox checkboxButton = null;
	private Button login = null;
	SharedPreferences sp = null;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.layout_main);
		sp = this.getSharedPreferences("userinfo", Context.MODE_PRIVATE);
		init();

	}

	public void init() {
		uname = (EditText) findViewById(R.id.user_input);
		upswd = (EditText) findViewById(R.id.pass_input);
		checkboxButton = (CheckBox) findViewById(R.id.checkBoxLogin);
		login = (Button) findViewById(R.id.new_user);
		if (sp.getBoolean("checkboxBoolean", false)) {
			uname.setText(sp.getString("uname", null));
			upswd.setText(sp.getString("upswd", null));
			checkboxButton.setChecked(true);

		}
		login.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		if (v == login) {
			String name = uname.getText().toString();
			String pswd = upswd.getText().toString();
			if (name.trim().equals("")) {
				Toast.makeText(this, "请您输入用户名！", Toast.LENGTH_SHORT).show();
				return;
			}
			if (pswd.trim().equals("")) {
				Toast.makeText(this, "请您输入密码！", Toast.LENGTH_SHORT).show();
				return;
			}
			boolean CheckBoxLogin = checkboxButton.isChecked();
			if (CheckBoxLogin) {
				Editor editor = sp.edit();
				editor.putString("uname", name);
				editor.putString("upswd", pswd);
				editor.putBoolean("checkboxBoolean", true);
				editor.commit();
			} else {
				Editor editor = sp.edit();
				editor.putString("uname", null);
				editor.putString("upswd", null);
				editor.putBoolean("checkboxBoolean", false);
				editor.commit();
			}
			// Intent跳转
			if (name.trim().equals("wang")&&pswd.trim().equals("123")) {
				
				Intent intent = new Intent(Welcome.this, Content.class);
				intent.putExtra("Stname", name.trim());
				startActivity(intent);
				finish();
			}
			else{
				Toast.makeText(this, "用户名或密码错误", Toast.LENGTH_SHORT).show();
				return;
				
			}
		}
	}

}