标签:android style blog http color os ar sp 数据
1. Activity的生命周期:
2. Activity启动另一个Activity,并传递数据:
package com.example.activitydemo; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; public class MainActivity extends Activity { protected static final String EXTRA_MESSAGE = "com.example.activitydemo.MESSAGE"; public Button btnActivityChange; public EditText editMessage; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnActivityChange = (Button) findViewById(R.id.btn1); editMessage = (EditText) findViewById(R.id.editMessage); btnActivityChange.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent i = new Intent(MainActivity.this, Activity2.class); String message = editMessage.getText().toString(); i.putExtra(EXTRA_MESSAGE, message); startActivity(i); } }); } }
package com.example.activitydemo; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; public class Activity2 extends Activity { private Button btnBack; private TextView textView1; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.activity2); btnBack = (Button) findViewById(R.id.btnBack); textView1 = (TextView) findViewById(R.id.textView1); Intent intent = getIntent(); textView1.setText(intent.getStringExtra(MainActivity.EXTRA_MESSAGE)); btnBack.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finish(); } }); } }
标签:android style blog http color os ar sp 数据
原文地址:http://www.cnblogs.com/510602159-Yano/p/4038389.html