java中int的用法_java instance「建议收藏」

Intent用法实例

1.无参数Activity跳转

Java代码  

Intent it = new Intent(Activity.Main.this, Activity2.class);

startActivity(it);

Intent it = new Intent(Activity.Main.this, Activity2.class);

startActivity(it);

2.向下一个Activity传递数据(使用Bundle和Intent.putExtras)

Java代码  

Intent it = new Intent(Activity.Main.this, Activity2.class);

Bundle bundle=new Bundle();

bundle.putString(“name”, “This is from MainActivity!”);

it.putExtras(bundle);       // it.putExtra(“test”, “shuju”);

startActivity(it);            // startActivityForResult(it,REQUEST_CODE);

Intent it = new Intent(Activity.Main.this, Activity2.class);

Bundle bundle=new Bundle();

bundle.putString(“name”, “This is from MainActivity!”);

it.putExtras(bundle); // it.putExtra(“test”, “shuju”);

startActivity(it); // startActivityForResult(it,REQUEST_CODE);

对于数据的获取可以采用：

Java代码  

Bundle bundle=getIntent().getExtras();

String name=bundle.getString(“name”);

Bundle bundle=getIntent().getExtras();

String name=bundle.getString(“name”);

3.向上一个Activity返回结果(使用setResult，针对startActivityForResult(it,REQUEST_CODE)启动的Activity)

Java代码  

Intent intent=getIntent();

Bundle bundle2=new Bundle();

bundle2.putString(“name”, “This is from ShowMsg!”);

intent.putExtras(bundle2);

setResult(RESULT_OK, intent);

Intent intent=getIntent();

Bundle bundle2=new Bundle();

bundle2.putString(“name”, “This is from ShowMsg!”);

intent.putExtras(bundle2);

setResult(RESULT_OK, intent);

4.回调上一个Activity的结果处理函数(onActivityResult)

Java代码  

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

// TODO Auto-generated method stub

super.onActivityResult(requestCode, resultCode, data);

if (requestCode==REQUEST_CODE){

if(resultCode==RESULT_CANCELED)

setTitle(“cancle”);

else if (resultCode==RESULT_OK) {

String temp=null;

Bundle bundle=data.getExtras();

if(bundle!=null)   temp=bundle.getString(“name”);

setTitle(temp);

}

}

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

// TODO Auto-generated method stub

super.onActivityResult(requestCode, resultCode, data);

if (requestCode==REQUEST_CODE){

if(resultCode==RESULT_CANCELED)

setTitle(“cancle”);

else if (resultCode==RESULT_OK) {

String temp=null;

Bundle bundle=data.getExtras();

if(bundle!=null) temp=bundle.getString(“name”);

setTitle(temp);

}

}

}

下面是转载来的其他的一些Intent用法实例(转自javaeye)

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Java代码