android中的Intent窗体活动穿梭

Posted 2020-09-28

活动之间的互相访问使用Intent

Intent显示访问通过按钮定义

button1.setOnClickListener(View.OnClickListener(){
        onClick(View v){Intent intent=Intent(MainActivity.,second_Activity.);
            startActivityForResult(intent,);


        }
});

Intent的隐示穿梭并不指定具体的穿梭对象，指定了一系列action和category等信息，然后系统分析找出合适的活动启动，并且需要在androidManifest中配置文件
button1.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v){
           Intent intent=new Intent("come.example.wcx.myapplication.ACTION_START");
           intent.addCategory("come.example.wcx.myapplication.Category");
            startActivity(intent);
            Intent intent=new Intent(Intent.ACTION_DIAL);
            intent.setData(Uri.parse("tel:10086"));
            startActivity(intent);
        


        }
});
Intent进行数据的传递
button1.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v){
           
            String data="Hello second";
            Intent intent=new Intent(MainActivity.this,second_Activity.class);
            intent.putExtra("Extra_String",data);
            startActivity(intent);

        }
});
 接收数据的活动
 Intent intent=getIntent();
final String hello=intent.getStringExtra("Extra_String");
 Log.d("second_Activity",hello);
 
 
 Intent回调数据

button1.setOnClickListener(View.OnClickListener(){
        onClick(View v){Intent intent=Intent(MainActivity.,second_Activity.);
            startActivityForResult(intent,);

}}

onActivityResult(requestCode,resultCode,Intent data)
{
    (requestCode)
    {
        : (requestCode==){
           String d=data.getStringExtra();
            Log.(,d);
        }
        ;
        :
    }
}

button2.setOnClickListener(View.OnClickListener() {
    onClick(View v) {
        Intent intent=Intent();
        intent.putExtra(,);
        setResult(,intent);
        finish();
    }
});